An address to the British Interplanetary Society given in 1948, first published as "Interplanetary Man?" in the November issue of the society's own journal. The version in The Coming of the Space Age (1967) is a slightly shortened one.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| April 1967 |
|
The Coming of the Space Age | Meredith Press | Nonfiction | 244 |
| 1970 |
|
The Coming of the Space Age | Panther | Nonfiction | 265 |