Incoming Resources
- Penguin Books in association with William Heinemann, Harmondsworth, c1971
- Puffin, Harmondsworth, 1991
- Puffin Books, New York, Harmondsworth, 2007
- Penguin, Harmondsworth, 1968, 1980 printing
- Warne, Harmondsworth, 1987, c1985
- Penguin Books, Harmondsworth, 1961