Worlds in balance
By: by F. L. Wallace
Series: Science Fiction Library -- no. 4; Science Fiction Library -- no. 4.
Publisher: Atlas Publications
Published: 1960
Place of publication: Melbourne
Language: eng
Number of pages: 114
Subjects: Science fiction
Notes: Date taken from Reginald's Science fiction and fantasy literature.

R. Reginald.  Science fiction and fantasy literature : a checklist 1700-1974, p. 540.