TY  - BOOK
AU  - Wittich, Walter Arno.
AU  - Schuller, Charles Francis.
TI  - Audiovisual materials: their nature and use 
U1  - 371.33 
PY  - 1962///
CY  - New York
PB  - Harper & Brothers
KW  - Audio-visual materials
KW  - Audio-visual education
N1  - Includes bibliographical references and index
ER  -