TY  - BOOK
AU  - Singh, Sheelwant
AU  - Singh, Sheelwant
AU  - Rastogi, Kriti
TI  - Science and Technology, Based on NCERT: For Civil services and state services examinations
SN  - 978-93-87572-91-1
U1  - 001 
PY  - 2018///
CY  - Chennai
PB  - McGraw Hill  Education
ER  -