The Lost World of the Colorado

From Author Wars - https://authorwars.com/books/the-lost-world-of-the-colorado-1632283.html

Overview:

Title: The Lost World of the Colorado
Author: Jack Heming
Year: 1940
Type: Novels

Editions/Publications:

Unknown. The Lost World of the Colorado (Unknown, Jack Heming, Frederick Warne and Co., 256 pages, Hardcover, Novel)