Williams, Guy R. Collecting pictures [electronic resource] [by] Guy R. Williams. - New York, Praeger [1968, c1967] - 144 p. illus. 23 cm. LCCN: 68019930 Subjects--Topical Terms: Art--Collectors and collecting. LC Class. No.: N8380 / .W49 1967a Dewey Class. No.: 707/.5