October 1973. Cover art by Rick Sternbach illustrating "A Program for Star Flight" (science essay) by G. Harry Stine. STORIES: "The Far Call" (serial, part 3 of 3) by Gordon R. Dickson; "Antalogia" by Walt Richmond and Leigh Richmond; plus stories by Vonda N. McIntyre, William E. Cochrane and others. FEATURES: "Experiments in Utopias" (editorial essay) by Carl Sagan; book reviews by P. Schuyler Miller, Brass Tacks (letters). Interior artwork by: Rick Sternbach, Vincent Di Fate and others. Editor: Ben Bova.