TY  - BOOK
AU  - Wittich,Walter A.
AU  - Schuller,Charles F.
TI  - Instructional technology, its nature and use
SN  - 0060471697
AV  - LB1043 .W57 1973
PY  - 1979///
CY  - New York 
PB  - Harper & Row 
KW  - Audio-visual education
N1  - Includes bibliographies and index
ER  -