TY  - BOOK
AU  - Gerlach, Vernon S. and Ely, Donald P. and Melnick, Rob
TI  - Teaching and media: : a systematic approach
SN  - 0138913587
U1  - 371.102 
PY  - 1980///
CY  - New Jersey
PB  - ; Prentice Hall
KW  - Education
KW  - Teaching
ER  -