Nebula alert
By: A. Bertram Chandler. The rival Rigelians / Mack Reynolds.
Contributors: Reynolds, Mack.
Series: Ace double -- G-632.; Ace double-novel books -- G-632.
Publisher: Ace Books
Published: 1967
Place of publication: New York
Language: eng
Number of pages: 132
Other titles: Rival Rigelians.
Notes: No collective t.p.; titles transcribed from individual title pages.

Texts bound together back-to-back and inverted.