TY  - BOOK
AU  - Sleeman,Phillip J.
TI  - Instructional media and technology: a guide to accountable learning systems 
SN  - 0582280400
PY  - 1979///
CY  - New York
PB  - Longman Inc. 
KW  - Educational technology
KW  - Addresses, essays
N1  - Includes bibliographies and index
ER  -