00989nam0-22003491i-450-99000144969040332188-7088-302-7000144969FED01000144969(Aleph)000144969FED0100014496920000920d1998----km-y0itay50------baengTopics on Gravitational LensingNorbert Straumann, Philippe Jetzer, Jean KaplanNapoliBibliopolisc1998XII, 116 p. . ill. , 23 cmNapoli series on physics and astrophysicsvol. 1AstronomiaAstrofisicaCosmologia520523Straumann,Norbert40415Jetzer,PhilippeKaplan,JeanITUNINARICAUNIMARCBK99000144969040332119-376FI1FI1Topics on Gravitational Lensing374255UNINAING01