AAnalog Science Fiction and Facf, October 1973, Featuring ArtAnalog Science Fiction and Facf, October 1973, Featuring Article by Carl Sagan *Experiments in Utopias* (Volume XCII, No. 2)de Ben BovaEdiciones (1)Analog Science Fiction and Facf, October 1973, Featuring Article by Carl Sagan *Experiments in Utopias* (Volume XCII, No. 2) (1973)Conde Nast PublicationsMás obras de Ben BovaGeorge Lucas's THX 1138Able one
