Letter (Astounding, March 1938): Ore by the Cubic Mile!

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Overview:

Title: Letter (Astounding, March 1938): Ore by the Cubic Mile!
Author: John W. Campbell, Jr.
Year: 1938
Type: Essays
Series: Letters: John W. Campbell, Jr.

Variant Titles:

1938. Letter (Astounding, March 1938): Ore by the Cubic Mile!