Elementary platen presswork / Ralph W. Polk. Platen presswork, Elementary. Polk, Ralph W. (Ralph Weiss) 1890- Presswork (Printing) Printing presses. Z256 .P77 655.3 POE Includes bibliographical references and index. Peoria, Ill. : The Manual arts press; c1931. c1931. 1931 Text xii, 148 p. incl. front., illus. : eng