Letter (Amazing Stories, January 1939): The Rocket Ship

From Author Wars - https://authorwars.com/books/letter-amazing-stories-january-1939-the-rocket-ship-1948091.html

Overview:

Title: Letter (Amazing Stories, January 1939): The Rocket Ship
Author: John D. Clark, Ph.D.
Year: 1939
Type: Essays

Variant Titles:

1939. Letter (Amazing Stories, January 1939): The Rocket Ship