Lahue, Kalton C. Kops and custards; the legend of Keystone Films a book by Kalton C. Lahue and Terry Brewer. With a foreword by Kent D. Eastin. - [1st ed.] - Norman University of Oklahoma Press [1967, c1968] - xxii, 177 p. illus. 24 cm. Bibliography: p. 167-168. LCCN: 67024625 Subjects--Corporate Names: Keystone Film Company. LC Class. No.: PN1999.K4 / L3 Dewey Class. No.: 791.43/09