TY  - BOOK
AU  - Agrahari, Ravi P.
TI  - Science and technology: : For civil services preliminary and main examination
SN  - 978-93-5532-266-1
U1  - 600 
PY  - 2023///
CY  - Chennai
PB  - McGraw Hill Education (India) Pvt. Ltd. 
ER  -