U. S. Bureau of Biology Survey. Fifty Common Birds of Farm and Orchard. Washington: Government Printing Office, 1913. (49D-1725)

U. S. Congress House of Representatives. Acceptance of the Statue of Will Rogers (House Document No. 471). Washington: U. S. Government Printing Office, 1939. (58D-339)

U. S. Copyright Office. Thirty-second Annual Report of the Register of Copyrights. Washington: Government Printing Office, 1929. (49D-1726)

Undset, Sigrid. Jenny. London: Syldendal, n. d. (49D-1724)

Urusov, Sergiei. Memoirs of a Russian Governor. London: Harper Brothers, 1908. (49D-1727)

Uspenskii, Petr. Tertium Organum, The Third Canon of Thought. New York: A. A. Knopf, 1925. Underlining. (49D-1728)

Utley, Freda. The Dream We Lost: Soviet Russia Then and Now. New York: John Day Company, 1940. (58D-340)