Final Blackout (Part 3 of 3)

From Author Wars - https://authorwars.com/books/final-blackout-part-3-of-3-112119.html

Overview:

Title: Final Blackout (Part 3 of 3)
Author: L. Ron Hubbard
Year: 1940
Type: Serials

Editions/Publications:

Unknown. Astounding Science-Fiction, June 1940 (Unknown, L. Ron Hubbard, Street & Smith Publications, Inc., $0.20, 164 pages, pulp, MAGAZINE)