TY  - BOOK
AU  - Wittich, Walter Arno
AU  - Schuller, Charles Francis
TI  - Instructional technology its nature and use
SN  - 0060471697
AV  - LB1043 W57 1979
PY  - 1979///
CY  - New York
PB  - Harper & Row
KW  - Enseñanza audiovisual
ER  -