TY  - BOOK
AU  - Ozarkar, S. P.
AU  - Maladkar, S. V.
AU  - Chavan, M. J.
TI  - How and Why in Science: Junior series
SN  - 19 561068 7
U1  - 500 
PY  - 1980///
CY  - Mumbai
PB  - Oxford University Press
ER  -