Teh, Betsy Lay Hong Essential Biology form 4 Betsy Teh Lay Hong - First published - vii, 327p. col. ill. 25cm. - Longman Essential SPM . ISBN: 9789674027582 Subjects--Topical Terms: Biology--Problems, Exercises, Etc.Biology--Examination, Questions, Etc. Dewey Class. No.: 570.76