Inside the Earth

From Author Wars - https://authorwars.com/books/inside-the-earth-128033.html

Overview:

Title: Inside the Earth
Author: Mildred Murdoch
Year: 1947
Type: Essays

Editions/Publications:

Unknown. Amazing Stories, September 1947 (Unknown, Mildred Murdoch, Ziff-Davis Publishing Company, $0.25, 180 pages, pulp, MAGAZINE)
Unknown. Amazing Stories Quarterly (Reissue), Spring 1948 (Unknown, Mildred Murdoch, Ziff-Davis, $0.35, pulp, MAGAZINE)