Para Onde Vamos? by Isaac Asimov, Stanley G. Weinbaum, Jerome Bixby, Arthur C. Clarke, H. Beam Piper, Walter Tevis, Larry Niven, Don A. Stuart, Lester del Rey, Milton A. Rothman, Robert A. Heinlein, Hal Clement, A.J. Deutsch, James Blish, William Morrison, James E. Gunn, Stuart H. Clarke