Sperisen, Francis J., 1900- The art of the lapidary. - Milwaukee, Bruce Pub. Co. [1950] - x, 382 p. illus. 25 cm. Bibliography: p. 370-371. LCCN: 50006533 Subjects--Topical Terms: Gems LC Class. No.: TS752 / .S73 Dewey Class. No.: 739.274