TY  - BOOK
AU  - Singh,Naunihal
TI  - Knowing your earth / 
SN  - 8174874364
AV  - QE40  .S61 2006
PY  - 2006///
CY  - New Delhi : 
PB  - Radha Pubications, 
KW  - Earth science--study and teaching
ER  -