TY  - BOOK
AU  - Singh,Ashok Kumar
TI  - Science and technology : for civil services examinations / 
T2  - Tata McGraw-hills series, 
U1  - 351.076 
PY  - 2011///
CY  - New Delhi : 
PB  - Tata McGraw Hill Education , 
KW  - CIVIL SERVICES EXAMINATION-GUIDE BOOK
N1  - NULL
ER  -