Author
Archives of Czechs and Slovaks Abroad
279
Ethnic Heritage Studies Program (U.S.)
216
United States. Bureau of the Census
136
Sinclair, Upton, 1878-1968
106
Historical Society of Pennsylvania
72
United States Commission on Civil Rights
72
Jones, Richard S.
70
United States. Work Projects Administration. Division of Professional and Service Projects
66
United States. National Archives and Records Service
59
Browder, Earl, 1891-1973
58
United States. Work Projects Administration. Division of Community Service Programs
58
United States. Congress. House. Committee on Un-American Activities
57
Pennsylvania Historical and Museum Commission
55
Foster, William Z., 1881-1961
51
United States
48
United States. Immigration and Naturalization Service
48
National Archives (U.S.)
47
Center for Migration Studies (U.S.)
46
Saroyan, William, 1908-
44
Whiteman, Maxwell
42
New Jersey Historical Records Survey Project
41
Library of Congress. Congressional Research Service
39
United States. Congress. Senate. Committee on the Judiciary
38
American Latvian Association in the United States
34
Communist Party of the United States of America
34
Farrell, James T. 1904-1979
34
Joint Center for Political Studies (U.S.)
34
Library of Congress Congressional Research Service
34
United States. War Relocation Authority
34
Balch Institute for Ethnic Studies
33
Pucelli, Rodolfo, 1885-
33
Schurz, Carl, 1829-1906
33
Vermont Historical Records Survey
33
U.S. Committee for Refugees
32
United States. Works Progress Administration. Division of Women's and Professional Projects
32
Du Bois, W. E. B. 1868-1963
31
Ukrainian National Association
31
B'nai B'rith. Anti-defamation League
30
Historical Records Survey (U.S.) Ohio
30
Industrial Workers of the World
30
Library of Congress
30
United States. Congress. House. Committee on the Judiciary
30
Egle, William Henry, 1830-1901
29
Maryland State Archives
29
United States. Bureau of Labor Statistics
29
University of Minnesota. Immigration History Research Center
29
Záň, Augustín J.
28
American Jewish Historical Society
27
North Carolina. State Department of Archives and History
27
Caradonna, Nino, 1898-1980
26
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