Brothers of Earth

From Author Wars - https://authorwars.com/publications/brothers-of-earth-5607.html

Overview:

Title: Brothers of Earth
Author: C. J. Cherryh
Year: 1977
ISBN-10: 0860079465
Publisher: Orbit / Futura
Price: £0.80
Pages: 254
Binding: Paperback
Type: Novel
Title Reference: Brothers of Earth
Notes:
"First published in Great Britain 1977"
Month from amazon.uk
Printing not stated, no number line; only known Orbit/Futura edition
The artist is not credited, no visible signature; credited here.
The map is not credited or signed here but is credited in the first printing.