TY  - BOOK
AU  - Gerlach, Vernon S..
TI  - Teaching & Media: A systematic approach / 
SN  - 0-13-8911358-7
U1  - T:3 
PY  - 1996///
CY  - New Jersey-07632 : 
PB  - Prentice-Hall Inc. , 
KW  - Teaching methods
ER  -