TY  - BOOK
AU  - Sampath, K
AU  - Pannireselvam, A
AU  - Santhanam, S
TI  - Introduction to educational technology
U1  - 371 21st
PY  - 1981///
CY  - New Delhi
PB  - Sterling
KW  - Educational technology; Teaching-Aids and devices; Teaching machines
ER  -