League of Nations Archives Online. Provides 14,2 million digitized pages covering all the activities of the League between 1920 and 1946, as well as maps and photographs. The entirety of League of Nations archives is digitized and freely available. For a description and background see: LONTAD - Total Digital Access to the League of Nations Archives.
League Publications Online. Browseable access to the major publications series of the League of Nations (Economic and Financial, Public Health, Disarmament, etc.) From the National Library of Scotland.
Statistical Yearbook of the League of Nations. Issues from 1929-1944, from the National Library of Scotland and from 1926-1944 from Northwestern University.
League of Nations Research Guide. Lists of reference works, scholarly monographs, periodicals, and bibliographies on the League and its work. From the Peace Palace Library in Geneva.
League of Nations Research Guides. Collection of detailed research guides on the League of Nations from the UN Library and Archives in Geneva.
Hein Online United Nations Law Library. Includes access to the League of Nations Treaty Series.
LONSEA - League of Nations Search Engine (University of Heidelberg. Primarily based upon the content of the Handbook of International Organizations, edited by the League of Nations from 1921 to 1938. Includes each of the organizations and activities mentioned in the Handbook as well as League of Nations’ personnel files from 1919 to 1946.