TY  - GEN
AU  - Bernal, J D
AU  - Rao, N. Narasimha
TI  -  Science in history
U1  - 509 23 rd
PY  - 2019///
CY  - Hyderabad
PB  - Ramaiah Vidya Pitham, 
KW  - Science
KW  - History
ER  -