TY  - BOOK
AU  - Tripathi, Dr. S.P.
AU  - Goyal, Dr. R.P.
AU  - Kumar, Prabhat.
TI  - Concise practical physics: Class ix
U1  - 530 TRI. 
PY  - 1995///
CY  - New Delhi
PB  - Selina publishers
ER  -