Beyond the Beyond

From Author Wars - https://authorwars.com/publications/beyond-the-beyond-286404.html

Overview:

Title: Beyond the Beyond
Author: Poul Anderson
Year: Unknown
Publisher: Signet
Price: $0.75
Pages: 263
Binding: Paperback
Type: Collection
Title Reference: Beyond the Beyond
Notes: Third Printing. No number line. Almost identical to the first printing. Artist is not credited, no visible signature. No publication date given.