00796nam0-22003011i-450-990001017950403321000101795FED01000101795(Aleph)000101795FED0100010179520000920d1963----km-y0itay50------baengAdvances in astronomy and astrophysicsedited by Zdenek KopalNew YorkAcademic Press1963AstronomiaAstrofisicaCosmologia520523Kopal,Zdenek1129ITUNINARICAUNIMARCBK99000101795040332119-065.0013822FI1FI1Advances in astronomy and astrophysics186119UNINAING01