TY  - BOOK
AU  - Parab, Yogita
AU  - Natarajan,Chitra
TI  - Ecological balances
T2  - Activity based foundation course on science, technology and society
U1  - 574(076) 
PY  - 1998///
CY  - Mumbai
PB  - Homi bhabha centre for science education
KW  - General science
KW  - ecology
ER  -