The Hidden Valley of Oz
From Author Wars - https://authorwars.com/books/the-hidden-valley-of-oz-1894646.html
Overview:
- Title: The Hidden Valley of Oz
- Author: Dirk Gringuis
- Year: 1951
- Type: Interior Art
Editions/Publications:
- Unknown. Bibliographia Oziana (Unknown, Dirk Gringuis, International Wizard of Oz Club, $7.50, 103 pages, Trade Paperback, Non-fiction)
- Unknown. The Baum Bugle, Autumn 1968 (Unknown, Dirk Gringuis, International Wizard of Oz Club, 24 pages, quarto, FANZINE)