@BOOK{ Book!D - 101005724,
AUTHOR = " Arthur B. Congdon, Charles R. Keeton",
TITLE = "Principles of gravitational lensing",
LIBRARY= "كتابخانه پردیس علوم (دانشگاه تهران)",
SUBJECT = "Gravitational lenses,Astrophysics",
URL = "/book/101005724/Principles-of-gravitational-lensing/"}