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- Communist Party USA (New York, New York)2
- Unidentified Creators2
- Afro-Am Publishing Company (Chicago, Illinois)1
- Albert Saifer, Publisher (Philadelphia, Pennsylvania)1
- Associated Publishers, Inc. (Washington, District of Columbia)1
- Bigard, Barney1
- Citizens for Jim Barber (Philadelphia, Pennsylvania)1
- Comay Productions (New York, New York)1
- Edward E. Strong Memorial Educational Fund (Brooklyn and Richmond Hill, New York)1
- Ellington, Duke, 1899-19741
- Freedomways Associates (New York, New York)1
- Haldeman-Julius, E. (Emanuel), 1888-19511
- Harmon Foundation (New York, New York)1
- Kraft Publishing Company (Philadelphia, Pennsylvania)1
- Mills, Irving, 1894-19851
- November 4th Committee (Philadelphia, Pennsylvania)1
- Othello Recording Corporation (New York, New York)1
- Philadelphia Social Science Forum (Philadelphia, Pennsylvania)1
- Thomas Nabried Center for Marxist-Leninist Education (Philadelphia, Pennsylvania)1
- Walker, William, 1905-1