United States. Congress. House. Committee on Immigration and Naturalization., American Federation of Labor., Immigration Collection of Prescott Farnsworth Hall (Harvard College Library), & Morrison, F. (1914). Restriction of immigration: Hearings before the Committee on Immigration and Naturalization, House of Representatives, sixty-third Congress, second session, on H.R. 6060 : statement of Frank Morrison, secretary of the American Federation of Labor, Friday, December 12, 1913. Washington: G.P.O..

United States. Congress. House. Committee on Immigration and Naturalization., American Federation of Labor, Immigration Collection of Prescott Farnsworth Hall (Harvard College Library), and Frank Morrison. Restriction of Immigration: Hearings Before the Committee On Immigration and Naturalization, House of Representatives, Sixty-third Congress, Second Session, On H.R. 6060 : Statement of Frank Morrison, Secretary of the American Federation of Labor, Friday, December 12, 1913. Washington: G.P.O., 1914.

United States. Congress. House. Committee on Immigration and Naturalization., American Federation of Labor, Immigration Collection of Prescott Farnsworth Hall (Harvard College Library), and Frank Morrison. Restriction of Immigration: Hearings Before the Committee On Immigration and Naturalization, House of Representatives, Sixty-third Congress, Second Session, On H.R. 6060 : Statement of Frank Morrison, Secretary of the American Federation of Labor, Friday, December 12, 1913. Washington: G.P.O., 1914.