Author
Ethnic Heritage Studies Program (U.S.)
26
Philadelphia Record
21
Watson, John F. 1779-1860
21
Socialist Labor Party
19
Archives of Czechs and Slovaks Abroad
18
De Leon, Daniel, 1852-1914
18
Sinclair, Upton, 1878-1968
17
Socialist Party (U.S.)
14
Balch Institute for Ethnic Studies
13
Hillquit, Morris, 1869-1933
12
Social Register Association (U.S.)
12
Earle, Alice Morse, 1851-1911
11
Engels, Friedrich, 1820-1895
11
Institute of Early American History and Culture (Williamsburg, Va.)
10
Lenin, Vladimir Ilʹich, 1870-1924
10
Benes, Peter
9
Catlin, George, 1796-1872
9
Kautsky, Karl, 1854-1938
9
Marx, Karl, 1818-1883
9
Miller, Randall M.
9
Addams, Jane, 1860-1935
8
Baltzell, E. Digby 1915-
8
Basky, Lajos
8
Bridenbaugh, Carl
8
Commission on Interracial Cooperation
8
Debs, Eugene V. 1855-1926
8
Du Bois, W. E. B. 1868-1963
8
Hazard, Willis P. 1825-1913
8
Hechtlinger, Adelaide, 1914-
8
Historical Society of Pennsylvania
8
Hostetler, John Andrew, 1918-
8
Nearing, Scott, 1883-1983
8
Philadelphia (Pa.). Commission on Human Relations
8
Pozzetta, George E.
8
Tocqueville, Alexis de, 1805-1859
8
United States Commission on Civil Rights
8
B'nai B'rith. Anti-defamation League
7
Beck, Henry Charlton, 1902-1965
7
Brown, William Montgomery, 1855-1937
7
Center for Migration Studies (U.S.)
7
Davis, Allen Freeman, 1931-
7
Foster, William Z., 1881-1961
7
Johnson, Hewlett, 1874-1966
7
Mumford, Thomas Howland, 1816-
7
Simons, A. M. 1870-1950
7
Yoder, Don
7
American Academy of Political and Social Science
6
Aurand, A. Monroe 1895-1956
6
Bellamy, Edward, 1850-1898
6
Benes, Jane Montague
6
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