System in the Sky
From Author Wars - https://authorwars.com/books/system-in-the-sky-1456585.html
Overview:
- Title: System in the Sky
- Author: Robert A. Heinlein Caleb B. Laning
- Year: 2011
- Type: Essays
Editions/Publications:
- Unknown. The Nonfiction of Robert Heinlein: Volume I (Unknown, Robert A. Heinlein, The Virginia Edition, ISBN-10: 9781897350423, v+622 pages, Hardcover, Non-fiction)
- Unknown. The Nonfiction of Robert Heinlein: Volume I (Unknown, Caleb B. Laning, The Virginia Edition, ISBN-10: 9781897350423, v+622 pages, Hardcover, Non-fiction)