TY  - BOOK
AU  - Singh, Ashok Kumar
TI  - Science & technology ; : for civil services examinations 
SN  - 9780070655485
U1  - 351.076 ASH 
PY  - 2013///
CY  - New Delhi : 
PB  - Tata McGraw Hil Education Private Limited
KW  - Science
KW  - Technology
KW  - Study guides
ER  -