El Expreso Cósmico (introduction)

From Author Wars - https://authorwars.com/books/el-expreso-cosmico-introduction-3264439.html

Overview:

Title: El Expreso Cósmico (introduction)
Author: Jack Williamson
Year: 1986
Type: Essays

Editions/Publications:

Unknown. La crema de la ciencia ficción (Unknown, Jack Williamson, Emecé Editores, ISBN-10: 9500419602, 429 pages, Hardcover, Anthology)