TY  - BOOK
AU  - De Kieffer,R.E
AU  - Cochran,Lee W.
TI  - Manual of audio-visual techniques
U1  - 371.33 
PY  - 1962///
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Audio-visual education
N1  - Includes bibliographical references and index
ER  -