Planet of the Knob-Heads

From Author Wars - https://authorwars.com/books/planet-of-the-knob-heads-2191642.html

Overview:

Title: Planet of the Knob-Heads
Author: Frank R. Paul
Year: 1939
Type: Interior Art

Editions/Publications:

Unknown. Science Fiction, December 1939 (Unknown, Frank R. Paul, Blue Ribbon Magazines, $0.15, 132 pages, pulp, MAGAZINE)