Verhelst, Wilbert Sculpture: tools, materials, and techniques. - Englewood Cliffs, N.J. Prentice-Hall [1973] - xiii, 287 p. illus. 28 cm. Bibliography: p. 261-263. ISBN: 0137966156 LCCN: 72010335 Subjects--Topical Terms: Sculpture LC Class. No.: NB1140 / .V47 Dewey Class. No.: 731.4