TY  - BOOK
AU  - Singh,Sheelwant
TI  - Science and technology
SN  - 9789352864614
PY  - 2019///]
CY  - Uttar Pradesh, India
PB  - Pearson India Education Services
KW  - Science
KW  - Examinations, questions, etc
KW  - Technology
KW  - Study and teaching
KW  - Civil service
KW  - India
KW  - Examinations
N1  - For civil services preliminary and main examinations
ER  -