In the notes in _Takeoff Too!_ this essay is stated to be a transcript of a talk delivered orally on 1968-04-19. it is not clear if the transcript was published in written form at that time.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| March 1987 |
|
Takeoff Too! | Starblaze / The Donning Company | Collection | 55 |