TY  - BOOK
AU  - ASHOK KUMAR SINGH
TI  - SCIENCE AND TECHNOLOGY FOR CIVIL SERVICES EXAMINATION
U1  - 351.076 SIN-S 
PY  - 2008///
PB  - Tata  Mc GrwHill  -Delhi
KW  - SCIENCE AND TECHNOLOGY FOR CIVIL SERVICES EXAMINATION   ASHOK KUMAR SINGH
ER  -