TY  - BOOK
AU  - Henry,Nelson B.
ED  - National Society for the Study of Education.
TI  - Audio-visual materials of instruction
T2  - Yearbook of the National Society for the Study of Education, 48th, pt. 1
AV  - LB5 .N25 48th, pt. 1
U1  - 370.62 
PY  - 1949///
CY  - Chicago
PB  - Univ. of Chicago Press
KW  - Visual education
KW  - Local
N1  - Includes "References."
ER  -