United States, Immigration Commission (1907-1910), creator Dillingham, William P. (William Paul), 1843-1923 United States, Congress., Senate., Committee on Immigration. Immigration Collection of Prescott Farnsworth Hall (Harvard College Library)
Martens, Ludwig Christian Alexander Karl, 1874-, creator Hardwick, Thomas W. (Thomas William), 1872-1944 Recht, Charles. Hourwich, Isaac Aaronovich, 1860-1924 Hoover, J. Edgar (John Edgar), 1895-1972 United States, Bureau of Immigration.
United States, Congress., House., Committee on Immigration and Naturalization., creator Blackwood, W. A. Johnson, Albert, 1869-1957 Immigration Collection of Prescott Farnsworth Hall (Harvard College Library)