00792nam0-22003011i-450-990001017940403321000101794FED01000101794(Aleph)000101794FED0100010179420000920d1962----km-y0itay50------baengAdvances in astronomy and astrophysicsedited by Zdenek KopalNew YorkAcademic Press1962AstronomiaAstrofisicaCosmologia520523Kopal,Zdenek1129ITUNINARICAUNIMARCBK99000101794040332119-0653909FI1FI1Advances in astronomy and astrophysics186119UNINAING01