Schlain, Bert H. The professional approach to modern salesmanship [by] Bert H. Schlain. - New York McGraw-Hill [1966] - ix, 278 p. 21 cm. LCCN: 66020720 Subjects--Topical Terms: Salesmen and salesmanship LC Class. No.: HF5438 / .S2432 Dewey Class. No.: 658.85