TY  - BOOK
AU  - Mehra,Vandana
TI  - Instructional systems design: an inovation in educational technology 
SN  - 8185396086
AV  - LB1028.38 .M44
PY  - 1992///
CY  - Delhi
PB  - S. S
KW  - Educational technology
N1  - Includes index
ER  -