Case of the Missing Planets

From Author Wars - https://authorwars.com/books/case-of-the-missing-planets-1291954.html

Overview:

Title: Case of the Missing Planets
Author: Kenneth Johns
Year: 1956
Type: Essays

Editions/Publications:

Unknown. Nebula Science Fiction, Number 19 (Unknown, Kenneth Johns, Peter Hamilton, 2/-, 112 pages, digest, MAGAZINE)