The Rim of the Unknown

From Author Wars - https://authorwars.com/publications/the-rim-of-the-unknown-289307.html

Overview:

Title: The Rim of the Unknown
Author: Frank Belknap Long
Year: 1978
ISBN-10: 0895160439
Publisher: Condor
Price: $1.95
Pages: 261
Binding: Paperback
Type: Collection
Title Reference: The Rim of the Unknown
Notes: Condor edition published 1978 on copyright page.
Cover artist not credited but clearly signed 'Ken Barr' on right behind rear of insect.
Info verified with Locus #218 (January 1979).