TY  - BOOK
AU  - Wittich, Walter Arno,
AU  - Schuller, Charles Francis,
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 60471697
SN  - 2
PY  - 1979///];copyright 1979.46
CY  - New York
PB  - Harper & Row
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Audio-visual education
N1  - Includes bibliographies and index; 5
ER  -