Hepner, Harry Walker. 1893-1984. Modern advertising : practices and principles / Harry Walker Hepner. - 3rd.ed. - New York : McGraw-Hill Book co., 1956. - x, 740 p. : ill. ; 23 cm. Includes index. Subjects--Topical Terms: Advertising. Dewey Class. No.: 659.1 / HEM 1956