TY  - BOOK
AU  - Singh, Ashok Kumar
TI  - Science and technology for Civil services examinations
T2  - Tata McGraw-Hills winning edge series
SN  - 9780070655485
PY  - 2008///
CY  - New Delhi
PB  - Tata McGraw Hill Publishing Co Ltd
KW  - Competitive Exam Guide
KW  - Science And Technology
ER  -