Supplement II: Is This Mere Fantasy?

From Author Wars - https://authorwars.com/books/supplement-ii-is-this-mere-fantasy-1521012.html

Overview:

Title: Supplement II: Is This Mere Fantasy?
Author: K. Tsiolkovsky
Year: 1963
Type: Essays

Editions/Publications:

Unknown. The Call of the Cosmos (Unknown, K. Tsiolkovsky, Foreign Languages Publishing House, 471+[8] pages, Hardcover, Collection)