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- Lee Cultural Center (Philadelphia, Pennsylvania)4
- Organization of Solidarity with the People of Asia, Africa and Latin America (Havana, Cuba)4
- Philadelphia Social Science Forum (Philadelphia, Pennsylvania)4
- Associated Publishers, Inc. (Washington, District of Columbia)3
- Peace and Freedom Party (Philadelphia, Pennsylvania)3
- Thomas Nabried Center for Marxist-Leninist Education (Philadelphia, Pennsylvania)3
- Monteiro for Congress Committee (Philadelphia, Pennsylvania)2
- Unidentified Creators2
- Afro-Am Publishing Company (Chicago, Illinois)1
- Albert Saifer, Publisher (Philadelphia, Pennsylvania)1
- Anti-Defamation League of B'nai B'rith (New York, New York)1
- Association for the Study of Negro Life and History (Washington, District of Columbia)1
- Black Fire Production (Washington, District of Columbia)1
- Broadside Press (Detroit, Michigan)1
- Citizens for Jim Barber (Philadelphia, Pennsylvania)1
- Comay Productions (New York, New York)1
- Committee to Defend Fletcher Mills (Philadelphia, Pennsylvania)1
- Committee to Free Angela Davis (Philadelphia, Pennsylvania)1
- Communist Party USA1
- Communist Party USA (New York, New York)1