TY  - BOOK
AU  - Wagner Leslie
TI  - The economics of educational media
SN  - 0333316908
U1  - 371.3078 
PY  - 1982///
CY  - London
PB  - Macmillan
KW  - Open learning systems-Economics aspects
KW  - Education - Cost control
KW  - Education - Audiovisual aids
KW  - Education - Economics aspects
N1  - Includes index
ER  -