00848nam0-22003011i-450-990001015010403321000101501FED01000101501(Aleph)000101501FED0100010150120000920d1971----km-y0itay50------baengExtraterrestrial CivilizationsProblems of Interstellar CommunicationsS.A. KaplanJerusalemIsrael Program for Scientific Translations1971AstronomiaAstrofisicaCosmologia520523Kaplan,Samuil Aronovich334908ITUNINARICAUNIMARCBK99000101501040332119-0847607FI1FI1Extraterrestrial Civilizations355403UNINAING01