Leaf, Ruth. Intaglio printmaking techniques / by Ruth Leaf. - New York : Watson-Guptill Publications, 1976. - 232 p. : ill. (some col.) ; 31 cm. Includes index. Bibliography: p. 229. ISBN: 0823025543 Subjects--Topical Terms: Intaglio printing. LC Class. No.: NE1625 / .L4 1976 Dewey Class. No.: 765