Tool for Tomorrow

From Author Wars - https://authorwars.com/books/tool-for-tomorrow-1020083.html

Overview:

Title: Tool for Tomorrow
Author: Sylvia Engdahl Rick Roberson
Year: 1979
Type: Non-fiction

Editions/Publications:

Unknown. Tool for Tomorrow (Unknown, Sylvia Engdahl, Atheneum, ISBN-10: 0689306792, 94 pages, Hardcover, Non-fiction)
Unknown. Tool for Tomorrow (Unknown, Rick Roberson, Atheneum, ISBN-10: 0689306792, 94 pages, Hardcover, Non-fiction)