Peace and Conflict Studies

Ergo FIGO: Identifying Formal Intergovernmental Organizations

Thomas J. Volgy et. al. Working Papers Series in International Politics. Tucson, Arizona, University of Arizona, Department of Political Science, December 2006.
"In this effort we probe the conceptual and empirical dimensions related to identifying the existence of intergovernmental organizations (IGOs) in international affairs...."

The United Nations

United Nations Digital Library System

UN and other documents and publications indexed by the UN Dag Hammarskjold Library in New York and the UN Library in Geneva. Security Council Plenary Documents; General Assembly Official Records; Economic and Social Council Official Records; and the Trusteeship Council Official Records all digitized back to 1946. Also contains the UN Statistical Yearbooks (1948-2017), and the Yearbook on Human Rights (1946-1988). Not all records in the database have digital files attached; some results include Library-created metadata such as voting information for resolutions adopted by the General Assembly and Security Council, and citations to speeches made in the principal organs.

Official Document System of the United Nations

1993- Index to the full text of UN parliamentary documents (resolutions and decisions from the General Assembly, Security Council, Economic and Social Council, Trusteeship Council, and their subsidiary bodies). Also includes documents from global conference convened by the UN. Official resolutions and decisions back to 1946 are in the "Resolutions" database, available from the "Advanced Search" screen.

UN Wire
Archive as well daily email briefing (free) of news about the UN and about international affairs.

OECD

OECD iLibrary

Online library of publications, including 24 periodicals as well as many statistical series, from the Organisation for Economic Co-operation and Development (OECD). Focuses on the OECD's thirty member countries, although information on the some 70 other countries and non-governmental organizations with whom the OECD has an active relationship if also available. Rutgers-restricted Access

NATO

North Atlantic Treaty Organisation (NATO)

In addition to recent news, opinion and analysis, speeches, etc., site includes an eLibrary of topical publications, reference works, speeches and articles, and updates on current activities. Official Texts includes documents relating to the antecedents of the Alliance, juridical texts and format agreements (1949-1997), and key policy documents.

See Stephanie Bartz' excellent guide