TY  - BOOK
AU  - , BHAGAWAN DAS
TI  - VIDO VIDHY NIDASHAN
U1  - H-520.954 
PY  - 1959///
CY  - NEW DELHI 
PB  - ITIHAS PRAKASHAN MANDAL
KW  - ASTRONOMY & ALLIED SCIENCES
UR  - https://drive.google.com/file/d/1mNM9GZZOasSMEMU6RlseVNOZ4UIAQo0A/view?usp=sharing
ER  -