Hill, Edward. The language of drawing. - Englewood Cliffs, N.J. : Prentice-Hall, c1966. - iv, 152 p. : illus. ; 21 cm. Bibliography: p. 146-152. LCCN: 66028111 //r81 Subjects--Topical Terms: Drawing. LC Class. No.: NC390 NC390 / .H5 / .H5 Dewey Class. No.: 741