Secondary Universes and Magic Lands

From Author Wars - https://authorwars.com/books/secondary-universes-and-magic-lands-1370260.html

Overview:

Title: Secondary Universes and Magic Lands
Author: Franz Rottensteiner
Year: 1975
Type: Essays

Editions/Publications:

Unknown. The Science Fiction Book: An Illustrated History (Unknown, Franz Rottensteiner, New American Library, $6.95, 160 pages, Trade Paperback, Non-fiction)