Gallun (Raymond Z.) [writing as: William Callahan]
Title: The Machine that Thought. By William Callahan.
Publisher:  NY: Columbia Publications, [ca.1942]. First edition.
Seller ID: 50918
24pp. Original stapled white wrappers, designed and lettered in black. Published as Science Fiction Classics No. 3. Some dust soiling, small ink bookstore stamp on back cover, but a nice copy. Pictorial cover and one illustration.