Triplanetary (Part 4 of 4)

From Author Wars - https://authorwars.com/books/triplanetary-part-4-of-4-2155034.html

Overview:

Title: Triplanetary (Part 4 of 4)
Author: E. E. 'Doc' Smith
Year: 2010
Type: Serials

Editions/Publications:

Unknown. Polygraff, v1 #4 (Unknown, E. E. 'Doc' Smith, Polymancer Studios, $4.95, unknown, MAGAZINE)