TY  - BOOK
AU  - De Kieffer,Robert E.
AU  - Cochran,Lee W.
TI  - Manual of audio-visual techniques
T2  - Prentice-Hall education series
AV  - LB1043 .D45 1962
U1  - 371.335 DEK 
PY  - 1962///
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Audio-visual education
ER  -