Lecture at the Second United Nations Conference on the Exploration and Peaceful Uses of Outer Space (Unispace '82), Vienna, 10 August 1982.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| February 1984 |
|
1984: Spring / A Choice of Futures | Del Rey / Ballantine | Nonfiction | 99 |
| July 1984 |
|
1984: Spring - A Choice of Futures | Granada | Nonfiction | 110 |
| December 1985 |
|
The Planets | Bantam Books | Anthology | 22 |
| December 1989 |
|
The Planets | Bantam Spectra | Anthology | 22 |
| July 1993 |
|
By Space Possessed: Essays on the Exploration of Space | Gollancz | Nonfiction | 42 |