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