TY  - BOOK
AU  - Acharya, B.P.
AU  - Sahu, D.C.
TI  - Analytical geometry of quadratic surfaces
SN  - 9788127255459
U1  - 516.36 
PY  - 2011///
CY  - New Delhi
PB  - Kalyani Publishers
KW  - Sphere
KW  - Central conicoid
ER  -