Isaac Asimov, George Zebrowski, Martin H. Greenberg, James E. Gunn, Steven Weinberg, Stanisław Lem, Clifford D. Simak, Gregory Benford, Laurence Manning, Brian W. Aldiss, A. E. van Vogt, Carl Sagan, Arthur C. Clarke, Raymond Z. Gallun, Eric Frank Russell, H. G. Wells, Chad Oliver, Theodore L. Thomas, Richard McKenna and Ian Watson
Isaac Asimov, Martin H. Greenberg, Charles Waugh, Cordwainer Smith, Richard McKenna, Robert Sheckley, Christopher Anvil, Doris Pitkin Buck, Frank M. Robinson, A. E. van Vogt, Anne McCaffrey, James V. McConnell, A. Bertram Chandler, Eric Frank Russell and Fred Saberhagen
Arthur C. Clarke, Geo. W. Proctor, Harlan Ellison, Roger Zelazny, Brian W. Aldiss, Richard McKenna, Gordon R. Dickson, Jack Vance, Samuel R. Delany, Fritz Leiber, Michael Moorcock, Kate Wilhelm, Richard Wilson, Anne McCaffrey and Robert Silverberg
