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Alexander Wetmore, 1886-1978
Guide to the records of the Office of the Secretary (Samuel P. Langley), 1866-1927 / by James A. Steed
Guide to the records of the Office of the Secretary (Charles D. Walcott), 1890-1929 / by James A. Steed
Alexander Wetmore: June 18, 1886-December 7, 1978