00640nam a2200205Ia 4500003000900000008004100009020001800050040001600068080001600084100001800100245011400118260003400232300001600266490003800282650004100320650001600361650002500377700001500402700001700417IN-BaIIA211028s9999    xx            000 0 eng d  a3-540-97070-3  cIIA Library  a52-423bSCH  aSchneider, P. 0aGravitational lensescP. Schneider, J. Ehlers and E. E. Falco                                                  aBerlinbSpringer-Verlagc1992  axiii, 560p.  aAtronomy and astrophysics library  aAstronomy and astrophysics thesaurus  aBlack holes  aGravitational lenses  aEhlers, J.  aFalco, E. E.