TY  - BOOK
AU  - Heinich, Robert
AU  - Molenda, Michael
TI  - Instructional Media,   
SN  - 0 02 946083 2 
U1  - 371.3  
PY  - 1990///
CY  - London
PB  - Macmillan
KW  - Educational technology
N1  - Includes appendix & glossary
ER  -