Brown, George Ingham. A simple guide to modern valency theory. With a foreword by L. E. Sutton. - London New York Longmans, Green [1953] - ix, 174 p. diagrs., tables. 19 cm. LCCN: a 53007962 Subjects--Topical Terms: Valence (Theoretical chemistry) LC Class. No.: QD469 / .B7