TY - BOOK AU - Levin,Joel R. TI - Learner differences: diagnosis and prescription T2 - Principles of educational psychology series SN - 0030152968 AV - LB1051 .L597 U1 - 370.15/2 PY - 1977/// CY - New York PB - Holt, Rinehart and Winston KW - Learning, Psychology of KW - Local N1 - Includes index; Bibliography: p. [133]-142 ER -