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- Unidentified Creators10
- Anti-Defamation League of B'nai B'rith (New York, New York)5
- Black Panther Party (Philadelphia, Pennsylvania)5
- Communist Party USA5
- Peace and Freedom Party (Philadelphia, Pennsylvania)5
- Lee Cultural Center (Philadelphia, Pennsylvania)4
- Monteiro for Congress Committee (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
- Association for the Study of Negro Life and History (Washington, District of Columbia)3
- National Alliance Against Racist and Political Repression (New York, New York)3
- Thomas Nabried Center for Marxist-Leninist Education (Philadelphia, Pennsylvania)3
- Black House (Philadelphia, Pennsylvania)2
- Civil Rights Congress (New York, New York)2
- Committee to Defend Fletcher Mills (Philadelphia, Pennsylvania)2
- Communist Party USA (New York, New York)2
- Congress of Racial Equality (Philadelphia, Pennsylvania)2
- Mercy-Douglass Hospital Campaign (Philadelphia, Pennsylvania)2
- National Association for the Advancement of Colored People (New York, New York)2