TY  - BOOK
AU  - Gerlach,Vernon S.
TI  - Teaching and media: a systematic approach 
SN  - 138913331
AV  - LB1044.88 .G47
PY  - 1971///
CY  - Englewood Cliffs
PB  - Prentice-Hall
KW  - Media programs (Education)
KW  - Teaching
KW  - Aids and devices
ER  -