Joe Haldeman, Charles Sheffield, Gregory Benford, David Langford, Poul Anderson, Edward Bryant, Robert A. Heinlein, Robert Frazier, Reginald Bretnor, Michael G. Coney, Jerry Pournelle, G. Harry Stine, Randall Garrett, Alan E. Nourse, Tom Purdom, Dean Ing, Rick Rubin, Paul J. Nahin, Roger A. Beaumont, R. Snowden Ficks