Volume 3 & 4 edited by F.S.P. Ng. Imprint of v. 1 covered by label which reads: Distributed in the U.S.A. by Humanities Press, New York. Label on t.p. of v. 2 reads: Distributed in the U.S.A. by Longman Inc., New York, N.Y.; Vol. 4 published by Longman Malaysia. Includes bibliographical references.