1. Leaflet. Speak Out! For the Release of Plainfield's Black Hostages Creator: Plainfield Joint Defense Committee (Plainfield, New Jersey) Published / Created: 1970 Call Number: JWJ MSS 36 Collection Title: Printed ephemera of African American political activism and arts Container / Volume: Box 2 | Folder 113 Image Count: 6 Resource Type: Archives or Manuscripts Found in: Beinecke Rare Book and Manuscript Library > Leaflet. Speak Out! For the Release of Plainfield's Black Hostages