Yale University Library has been a depository for United Nations publications since 1945. The UN depository collection includes:
Other United Nations depository libraries in the Northeast include Brown, Columbia, Harvard, New York University, and Princeton. Consult the complete list of United Nations depository libraries for more information.
The "indexes to proceedings" for the General Assembly, Security Council, Economic and Social Council and Trusteeship Council provide:
(1) a comprehensive subject index to all the documents (reports, letters, meeting records, resolutions, etc.) issued by the body in question during a particular session/year; and
(2) an index to speeches delivered before the forum in question during a particular session/year.
The UN provides a useful description of the indexes to proceedings.