Wandl the Invader / I Speak for Earth

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Overview:

Title: Wandl the Invader / I Speak for Earth
Author: Keith Woodcott Ray Cummings
Year: 1961
Type: Omnibuses

Editions/Publications:

Unknown. Wandl the Invader / I Speak for Earth (Unknown, Keith Woodcott, Ace Books, $0.35, 135+120 pages, dos, Omnibus)
Unknown. Wandl the Invader / I Speak for Earth (Unknown, Ray Cummings, Ace Books, $0.35, 135+120 pages, dos, Omnibus)