TY - BOOK AU - Lefton,Lester A. AU - Valvatne,Laura TI - Mastering psychology SN - 0205106269 (pbk.) U1 - 150 19 PY - 1988/// CY - Boston PB - Allyn and Bacon KW - Psychology N1 - Includes indexes; Bibliogr.: p. 649-677 ER -