TY  - GEN
AU  - Kali Shankar
AU  - Upadhyaya , T. N.  
TI  - Brahmand aur telescope
SN  - 9789380183190
U1  - 520.5 
PY  - 2019///
CY  - New Delhi
PB  - Gyan Ganga
KW  - Astronomy
ER  -