Underground Heating System

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Overview:

Title: Underground Heating System
Author: John Dunn (II)
Year: 1949
Type: Essays

Editions/Publications:

Unknown. Amazing Stories, December 1949 (Unknown, John Dunn (II), Ziff-Davis Publishing Company, $0.25, 164 pages, pulp, MAGAZINE)
Unknown. Amazing Stories Quarterly (Reissue), Summer 1950 (Unknown, John Dunn (II), Ziff-Davis, $0.50, pulp, MAGAZINE)