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Diplomatic Relations Between the United States and Japan, 1908-1924 . Documents for the Year 1925. International Conciliation, no. 211 (June 1925).
U.S. Bureau of Immigration. Commissioner-General of Immigration. Annual Report . 1900 and 1901.
U.S. Congress. House of Representatives. Immigration of Japanese . House Doc. 686, 56th Congress, 1st sess., 15 May 1900.
———. House of Representatives. Select Committee Investigating National Defense Migration. Fourth Interim Report . House Kept. 2124, 77th Congress, 2d sess., May 1942.
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———. Senate. Response to resolution by Commissioner General of Immigration, report relative to importation of Japanese . S. Doc. 380, 56th Congress, 1st sess., 18 May 1900.
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———. Historical Statistics of the United States. Colonial Times to 1957 . Washington, D.C.: Government Printing Office, 1960.
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———. Bureau of Intelligence. Investigative Reports. 1920-1922 . Microfilm. Record Group 65. National Archives, Washington, D.C.
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———. Papers Relating to Foreign Relations of the United States . 1891-1924.
U.S. Department of War. Military Intelligence Division. Memoranda and Reports . 1918-1930. Record Group 165. National Archives, Washington, D.C.