TY  - GEN
AU  - Singh, Ashok Kumar
TI  - Science & tecnology: for civil services examinations
T2  - TATA McGraw Hill's series
SN  - 9780070655485
PY  - 2009///
CY  - New Delhi
PB  - TMH
KW  - Science & tecnology - competition examination guide
KW  - Competition examination guide - Science & tecnology
ER  -