00867nam0-22003011i-450-990001047640403321000104764FED01000104764(Aleph)000104764FED0100010476420000920d1958----km-y0itay50------baengVIIIth International Astronautical Congress, Barcelona 1957 ProceedingsEditor in chief Friedrich HechtWienSpringer-Verlag1958AstronomiaAstrofisicaCosmologia520523Hecht,Friedrich49966ITUNINARICAUNIMARCBK99000104764040332119-013815FI1FI1VIIIth International Astronautical Congress, Barcelona 1957 Proceedings341114UNINAING01