TY  - GEN
AU  - Singh, Lakhmir
AU  - Kaur, Amarjit      
TI  - Science guide : for tenth class
SN  - 8121907225
U1  - 507.6 
PY  - 1997///
CY  - New Delhi
PB  - Eurasia publishing house
KW  - Energy
KW  - Fuels
KW  - Biosphere
ER  -