TY  - BOOK
AU  - Beck,Robert C.
TI  - Motivation: theories and principles 
SN  - 0136039103 :
U1  - 153.8 BEC 
PY  - 1983///
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Motivation (Psychology)
N1  - Includes bibliography (p. 425-466) and index
ER  -