Schlain, Bert H. Big-league salesmanship. [electronic resource] . — Englewood Cliffs, N.J., : Prentice-Hall, [1955]. — 228 p. 24 cm. LCCN: 55009123 Nat. Bib. No.: GB57-924 Subjects--Topical Terms: Salesmen and salesmanship. LC Class. No.: HF5438 / .S243 Dewey Class. No.: 658.85