TY  - BOOK
AU  - 
AU  - Crawford,William Roy,1932-
TI  - The psychology of learning and instruction: educational psychology
SN  - 0137329172
PY  - 1974///
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Educational psychology
N1  - Includes indexes; p. 567-593
ER  -