TY  - BOOK
AU  - Agrahari Ravi P
TI  - Science and technology: For Civil Services Preliminary and main Examinations 
SN  - 978-93-90113-06-4
U1  - 600.076 23
PY  - 2020///
CY  - Chennai.
PB  - McGraw Hill Education
N1  - Part A Science and Technology in India
Part B UPSC Mains Answers- New Pattern science and technology
ER  -