TY  - BOOK
AU  - Natarajan,Chitra
TI  - Resources: land and air
T2  - Activity based foundation course on science, technology and society
U1  - 502.2(076) 
PY  - 1997///
CY  - Mumbai
PB  - Homi bhabha centre for science education
KW  - General science
KW  - land resources
KW  - air resources
ER  -