This article was a follow-up to the authors' successful "Flight into the Future", but was never published. Cal Laning was a USNA classmate of Heinlein.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| July 2011 |
|
The Nonfiction of Robert Heinlein: Volume I | The Virginia Edition | Nonfiction | 229 |