TY  - BOOK
AU  - DR KENNETH B HAAS
TI  - PREPARATION AND USE OF AUDIO- VISUAL AIDS
U1  - GN 371.33 H 111 
PY  - 1955///
CY  - NEW YORK
PB  - PRENTICE- HALL, INC.
KW  - PREPARATION AND USE OF AUDIO- VISUAL AIDS
N1  - MODERN BOOK HOUSE
ER  -