Chancellor's Address at the University of Moratuwa Convocation, Bandaranaike Memorial International Conference Hall, Colombo, 31 March 1983.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| February 1984 |
|
1984: Spring / A Choice of Futures | Del Rey / Ballantine | Nonfiction | 133 |
| July 1984 |
|
1984: Spring - A Choice of Futures | Granada | Nonfiction | 144 |
| July 1993 |
|
By Space Possessed: Essays on the Exploration of Space | Gollancz | Nonfiction | 114 |