Worlds in Balance

From Author Wars - https://authorwars.com/books/worlds-in-balance-1915314.html

Overview:

Title: Worlds in Balance
Author: O'Reilly
Year: 1975
Type: Interior Art

Editions/Publications:

Unknown. 2000 A.D.: Illustrations from the Golden Age of Science Fiction Pulps (Unknown, O'Reilly, Henry Regnery, ISBN-10: 0809281171, $7.95, 176 pages, Trade Paperback, Non-fiction)