TY - BOOK AU - Kembhavi, A. K AU - Narliker, J. V TI - Quasars and active galactic nuclei: an introduction SN - 0-521-47989-4 PY - 1999/// CY - Cambridge PB - Cambridge University Press KW - Cosmological Frame work KW - Gravitational Lensing KW - Quasars KW - X-Ray Emisssion ER -