Second Session, On H. R. 3178, Serial 27, February 9, 1922 (Washington, DC: Government Printing Office, 1922), 15; Moses B. Cotsworth, The Rational Almanac: Tracing the Evolution of Modern Almanacs from Ancient Ideas of Time, and Suggesting Improvements (Acomb, UK: Self-published, 1902).
- LNA CTS, 1928-1932, 9a/1487/1487, Calendar Reform, Correspondence with M. Cotsworth, letter, Haas to Cotsworth, July 26, 1928; and the materials in dossier 9a/14067/1487 on Cotsworth's tour in Latin America; dossier 9a/20987/1487 on a tour in the Far East and Canada; 9a/24495/1487 on Cotsworth's tour in the Near East.
- LNA CTS, 1928–1932, 9a/24495/1487, Calendar Reform, Cotsworth's tour in the Near East, letter Cotsworth to Haas, January 14, 1931.
- LNA CTS, 1933–1946, 9a/3743/1174, Calendar Reform, the World Calendar Association, memorandum, Essy Key-Lehmann, The League of Nations and Calendar Reform: Past, Present, and Future Developments, 3.
- LNA CTS, 1919–1927, 14/22679/12478, Reform of the Calendar, Provisional Committee, League of Nations, Advisory Technical Committee on Communications and Transit, Note on the Reform of Calendar, Geneva, August 14, 1922, 12.
- Modification of the Calendar, Hearing before the Committee on the Judiciary, 41, 5, 16.
- Albert W. Whitney, The Place of Standardization in Modern Life,With Introduction by the Honorable Herbert Hoover (Washington, DC: Inter-American High Commission， 1924). 此前在泛美洲的语境下，历法改革一直被人提起。在1909年的泛美洲科学代表大会上，来自秘鲁的卡洛斯·A.赫斯（Carlos A. Hesse）提交了一份有13个月历法：Carlos A. Hesse, Proyectode reforma del calendario presentado al 4 congreso cientifco (Iquique, 1909).
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