TY  - BOOK
AU  - Sehgal N.K. (Acharya Narendra) Au.; Jayashree Ramam Au.; Sarita Kumar Au.; Arora O. P. Ed.
TI  - Visualised science and technology
SN  - 978-81-88237-32-6
PY  - 2134///
CY  - New Delhi, India
PB  - Sultan Chand
ER  -