Horn, George F. The crayon; a versatile medium for creative expression [by] George F. Horn. - [Worcester, Mass. Davis Publications 1969] - 64 p. illus. (part col.) 24 x 25 cm. Bibliography: p. 62-63. ISBN: 0871920298 LCCN: 76078029 Subjects--Topical Terms: Crayon drawing. LC Class. No.: NC855 / .H6 Dewey Class. No.: 741.2/3