TY  - BOOK
AU  - Wagner,Leslie
TI  - The economics of educational media
SN  - 0333316908
U1  - 371.3033 
PY  - 1982///
CY  - London
PB  - Macmillan
KW  - Audio-visual education
KW  - Economic aspects
N1  - Teaching aids: Audiovisual materials. Economic aspects (BNB/PRECIS); Bibliography: p152-157. - Includes index
ER  -