TY  - BOOK
AU  - Kieffer,R.E.de
AU  - Cochran,Lee W.
TI  - Manual of audio-visual techniques
U1  - 371.33/K47m 
PY  - 1955///, 1962
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall, inc.
KW  - Audiovisual education
N1  - Bibliography and audio-visual materiale at the end of chapters
ER  -