TY  - BOOK
AU  - Gerlach,Vernon S.
AU  - Ely,Donald P.
TI  - Teaching and media: a systematic approach
SN  - 0138913331
AV  - LB1043 .G318
U1  - 371.3 
PY  - 1971///]
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Audiovisual education
KW  - Local
KW  - Teaching
KW  - Aids and devices
N1  - Includes bibliographies
ER  -