The Penguin Science Fiction Omnibus

From Author Wars - https://authorwars.com/publications/the-penguin-science-fiction-omnibus-45183.html

Overview:

Title: The Penguin Science Fiction Omnibus
Author: Brian Aldiss
Year: 1974
ISBN-10: 0140031456
Publisher: Penguin Books
Price: £0.60
Pages: 616
Binding: Paperback
Type: Anthology
Title Reference: Lot
Notes:
Omnibus edition previously published as Penguin Science Fiction (1961), More Penguin Science Fiction (1963) and Yet More Penguin Science Fiction (1964). "Published in one volume 1973" "Reprinted 1974"; no number line "Cover design by David Pelham" on back cover, no visible signature on the artwork UK 60p, Australia $2.10, New Zealand $2.10, Canada $2.50 [by sticker only, not printed]
Yes, this does contain stories by Walter M. Miller AND Walter M. Miller, Jr; a short story is by Brian W. Aldiss but the essay and entire volume are as by Brian Aldiss.