Isil Year Book of International Humanitarian and Refugee Law (New Delhi: Indian Society of International Law, 2001-).

The Italian Yearbook of International Law (Napoli: Editoriale Scientifica; [Dobbs Ferry, N.Y.: Distributed by Oceana Publications], 1975-). Articles by Italian legal scholars and information on Italian practice related to public international law issues.

Japanese Annual of International Law (Tokyo: Japan Branch of the International Law Association, 1957-).  Articles on international law issues as well as court decisions, treaties, etc.

Netherlands Yearbook of International Law (Leiden: A.W. Sijthoff, 1970-). Substantive articles and Netherlands state practice. 

New Zealand Yearbook of International Law ([Christchurch, N.Z.]: International Law Group, School of Law, University of Canterbury, 2004-).

The Palestine Yearbook of International Law ([Nicosia, Cyprus]: Al-Shaybani Society of International Law, 1984-).

The Polish Yearbook of International Law (Wroclaw: Zaklad Narodowy Im. Ossolinskich, 1967-). Articles on international law issues and a list of the treaties Poland has ratified.

Schweizerisches Jahrbuch fur Internationales Recht = Annuaire Suisse de Droit International (Zurich: Polygraphischer Verlag, 1944-1990). German and French, includes articles and documents. 

Schweizerische Zeitschrift fur Internationales und Europaisches Recht = Revue Suisse de Droit International et de Droit Europeen (Zurich: Schulthess Polygraphischer Verlag, 1991-). 

Singapore Year Book of International Law (Singapore: Faculty of Law, National University of Singapore, 2004-). Also available on HeinOnline.

South African Yearbook of International Law = Suid-Afrikaanse Jaarboek vir Volkereg (Pretoria: VerLoren Van Themaat Centre for International Law, University of South Africa, 1975-).  Includes articles, court decisions, notes, and South Africa's practice regarding international law.

Sovetskii Ezhegodnik Mezhdunarodnogo Prava = Soviet Year-Book of International Law (Moskva: Izd-vo Akademiia Nauk SSSR, 1958-1994). Table of contents in English, French, German. Articles are summarized in English. 

Spanish Yearbook of International Law (Dordrecht ; Boston : M. Nijhoff, 1994-). Articles on international law from a Spanish point of view as well as Spain's state practice.

Rossiiskii Ezhegodnik Mezhdunarodnogo Prava = Russian Yearbook of International Law (Sankt-Peterburg: Sotsialno-kommercheskaia Firma "Rossia Neva", 1994-). Summaries and table of contents are in English. 

IGO Yearbooks

Individual IGOs publish yearbooks that provide an annual survey of activities. Some yearbooks cover the international law activities of various organizations.

Annual Review of United Nations Affairs (Dobbs Ferry, NY: Oceana, 1957-). ARUNA provides the text of important documents from the five key UN bodies.

Anuario Juridico Interamericano (Washington: Pan American Union, 1948-1986).  Reports of activities of the OAS. Includes legal studies and essays. 

Global Community: Yearbook of International Law and Jurisprudence (Dobbs Ferry, NY : Oceana Publications, Inc., 2001-). Contains substantive articles on international law issues, decisions of international courts and tribunals (such as ICJ, ITLOS, WTO, ICTY, and more), and a section on contemporary practice of international law.

Hague Yearbook of International Law = Annuaire de La Haye de Droit International (Dordrecht: M. Nijhoff, 1988-). Contains articles on international law issues and a section on the activities of international law institutions at the Hague (ICJ, ICTY, PCA, etc.).

Max Planck Yearbook of United Nations Law (London: Boston: Kluwer Law International, 1998-). This annual focuses on UN activities in the field of international law. Some volumes are available on the web.

United Nations Juridical Yearbook (New York: United Nations, 1962-). Covers judicial decisions of international and national tribunals. Includes unpublished legal opinions of the Secretariat.  Some legal opinions are available on the web.

United Nations International Law Commission, Yearbook of the International Law Commission (New York: United Nations, 1949-).  This body is charged with codifying international law. Includes summaries of reports and documents of I.L.C. and UN General Assembly, records of current session (commentaries on draft articles, articles under consideration) and record of annual session. This is a very important tool because often the views of the member-States are often sought on draft treaties. See the ILC web site.

Yearbook of European Law (New York: Oxford University Press, 1981-). Focuses on the EU. Includes case table. 

Yearbook of International Humanitarian Law (The Hague, The Netherlands: T.M.C. Asser Press, 1998-).

Yearbook of the United Nations (New York, United Nations, 1947-). Describes proceedings and activities of U.N. organs and bodies. 

Some Specific Sources

State Practice Regarding State Immunities (Leiden, The Netherlands ; Boston, MA : Martinus Nijhoff, 2006).

Customary International Humanitarian Law (Cambridge; New York: Cambridge University Press, 2005). Detailed three volume set; volume 1 contains the rules and vols 2 &3 contain examples of State practice.

Customary International Law on the Use of Force: A Methodological Approach ( Leiden ; Boston : M. Nijhoff, 2005).

General Principles

Article 38 of the International Court of Justice Statute includes "general principles of law recognized by civilized nations" to be another source of international law.

What are general principles of international law?

Principles of fairness and justice which are applied universally in legal systems around the world (e.g. good faith, res judicata, impartiality of judges). They frequently involve procedural matters. International tribunals rely on these principles when they cannot find authority in other sources of international law.

Where can general principles be found?

• References in decisions of international tribunals and national courts.

• References in writings (or teachings) of publicists.

There are a few sources that provide information on general principles, see Cheng, General Principles of Law, as applied by International Courts and Tribunals (London, Stevens, 1953).

Judicial Decisions and Writings of Publicists

Article 38 also mentions "judicial decisions and the teachings of the most highly qualified publicists of the various nations, as subsidiary means for the determination of rules of law."  These are not authorities, rather they are evidence of the sources of international law. Use these materials to find references to and recognition of rules in other sources (treaties, customary law, and general principles).

Judicial Decisions of International Tribunals

In LawCat, search under the author: [name of court]; or under the subject: international law--cases.  Information on structure and procedure for many international courts and tribunals is available from Manual on International Courts and Tribunals (Philippe Sands, ed., London: Butterworths, 1999).

Permanent Court of International Justice

Recueil des Arrets = Collection of Judgments [Series A] (Leyden, Netherlands: A.W. Sijthoff, 1923-30).

Recueil Des Avis Consultatifs = Advisory Opinions [Series B] (Leyden : Société d'éditions A.W. Sijthoff, 1922-30). Later merged with Series A into Arrets Ordonnances et avis Consultatifs = Judgments, Orders, and Advisory Opinions. [Series A/B] (Leyden: A.W. Sijthoff, 1931-40). 

Actes et Documents Relatifs aux Arrêts et aux Avis Consultatifs de la Cour = Acts and Documents Relating to Judgments and Advisory Opinions [Series C] (Leyden: A.W. Sijthoff, 1922-30).

Permanent Court of International Justice (1922-1946) decisions are also available on the ICJ web site.