00870nam a2200241Ia 4500003000900000008004100009020001800050040001600068080001600084100002500100245011400125260003400239300001600273490003800289650004100327650002200368650003200390700002200422700002400444942000700468999001700475952013600492IN-BaIIA211028s9999    xx            000 0 eng d  a3-540-97070-3  cIIA Library  a52-423bSCH  aSchneider, P.918096 0aGravitational lensescP. Schneider, J. Ehlers and E. E. Falco                                                  aBerlinbSpringer-Verlagc1992  axiii, 560p.  aAtronomy and astrophysics library  aAstronomy and astrophysics thesaurus  aBlack holes97728  aGravitational lenses913648  aEhlers, J.918097  aFalco, E. E.918098  cBK  c10612d10612  00104070aBANbBANcGENd1993-03-10g2846.20l1o52-423/ SCHp11523r2026-01-13s2026-01-13v2846.20w1993-03-10yBKGRs. 2846.20