Thomas, S.Evelyn. Commerce : its theory and practice / S, Evelyn Thomas. - 11th ed. - London : Cassell, c 1979. - viii, 551 p. ; 21 cm. Includes index. 42 42 ISBN: 0 304 30404 2 Subjects--Topical Terms: Commerce. Dewey Class. No.: 382.01 / T369c