Calling All Martians!

From Author Wars - https://authorwars.com/books/calling-all-martians-127544.html

Overview:

Title: Calling All Martians!
Author: Willy Ley
Year: 1940
Type: Essays

Variant Titles:

1940. A Letter to the Martians

Editions/Publications:

Unknown. Thrilling Wonder Stories, November 1940 (Unknown, Willy Ley, Better Publications, Inc., $0.15, 132 pages, pulp, MAGAZINE)