00796nam0-22003011i-450-990001017980403321000101798FED01000101798(Aleph)000101798FED0100010179820000920d1967----km-y0itay50------baengAdvances in astronomy and astrophysicsedited by Zdenek KopalNew YorkAcademic Press1967AstronomiaAstrofisicaCosmologia520523Kopal,Zdenek1129ITUNINARICAUNIMARCBK99000101798040332119-065.0047935FI1FI1Advances in astronomy and astrophysics186119UNINAING01