TY  - BOOK
AU  - Singh, Ashok Kumar
AU  - 
TI  - Science and technology for civil services examinations
SN  - 0-07-065548-0
U1  - (079.1):5+6 
PY  - 2008///
CY  - New Delhi
PB  - Tata Mc-Graw Hill
KW  - Civil services- Examination guide
KW  - Competetive examination guide- Civil services
KW  - Science and Technology- Civil service examination guide
ER  -