Mankind on the run
By: Gordon R. Dickson
Contributors: Norton, Andre
Series: Ace double novel books -- D-164
Publisher: Ace Books
Published: 1956
Place of publication: New York
Language: eng
Number of pages: 169
Subjects: Science fiction
Notes: With (inverted): The crossroads of time/Andre Norton. New York : Ace, [c1956].

R. Reginald.  Science fiction and fantasy literature : a checklist 1700-1974, p. 151.