TY  - BOOK
AU  - Pervaiz, Wajeeha
AU  - Prof. Asghar Qadir.
TI  - Gravitational lensing for the Schwarzschildde Sitter Metric 
U1  - 510 
PY  - 2017///
CY  - Islamabad
PB  - SNS - NUST
KW  - Ms Thesis
ER  -