TY  - BOOK
AU  - Sheelwant Singh
AU  - Rastogi, Kriti
AU  - Sarika
TI  - Science and Technology: for civil services examination and various state examinations
SN  - 9387572919
U1  - 500 
PY  - 2018///
CY  - Chennai
PB  - McGraw Hill Education
ER  -