Mayday Orbit / No Man's World

From Author Wars - https://authorwars.com/books/mayday-orbit--no-mans-world-794593.html

Overview:

Title: Mayday Orbit / No Man's World
Author: Poul Anderson Kenneth Bulmer
Year: 1961
Type: Omnibuses

Editions/Publications:

Unknown. Mayday Orbit / No Man's World (Unknown, Poul Anderson, Ace Books, $0.40, 126+128 pages, dos, Omnibus)
Unknown. Mayday Orbit / No Man's World (Unknown, Kenneth Bulmer, Ace Books, $0.40, 126+128 pages, dos, Omnibus)