This primary source comes from the Records of the National Archives and Records Administration.
National Archives Identifier:
6922224Full Citation: Placing Paper for Printing over the Printing Plate; 4/13/1976; Records of the National Archives and Records Administration, Record Group 64. [Online Version, https://docsteach.org/documents/document/placing-paper-for-printing-over-the-printing-plate, May 3, 2024]