TY  - BOOK
AU  - Chattopadhyhay, Deepanwita
AU  - Chowdhary, Neena
TI  - Essential science
SN  - 8171813852
U1  - GC 500 C392 1995 
PY  - 1995///
CY  - India
PB  - Leaners Press
KW  - Science
ER  -