Palmer, W. G. Valency, classical and modern. - 2d ed. - Cambridge [Eng.] University Press 1959. - 244 p. illus. 23 cm. Includes bibliography. LCCN: 60000210 /L/r83 Subjects--Topical Terms: Valence (Theoretical chemistry) LC Class. No.: QD469 / .P3 1959 Dewey Class. No.: 541.396