TY  - BOOK
AU  - Levin,Joel R.
TI  - Learner differences: diagnosis and prescription 
SN  - 0-03-015296-8
U1  - Prof. 370.152 L665 1977 
PY  - 1977///
CY  - New York
PB  - Holt, Rinehart and Winston
KW  - Learning, Psychology of
ER  -