TY  - BOOK
AU  - Singh , Akhand Pratap 
TI  - Pramukh Bhoutik Vaigyanik aur Unke Aavishkar
SN  - 9789383963133
U1  - 530.0922 
PY  - 2014///
CY  - New Delhi
PB  - Prasanta Distributor  , 
KW  - Hindi Collection
ER  -