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Charles L. Fontenay
1988
Isaac Asimov, Charles G. Waugh and Martin H. Greenberg
Charles G. Waugh, Robert K. Silverberg and Martin H. Greenberg
1987
Isaac Asimov and Charles G. Waugh
1984
1970
Isaac Asimov, Martin H. Greenberg and Charles G. Waugh
1985
Charles G. Waugh
Robert Silverberg, Martin Harry Greenberg and Charles G. Waugh
1982
1986
Isaac Asimov, Charles G. Waugh and Ann Møller Nielsen
Translated by Ann Møller Nielsen
