Incoming Resources
- Penguin Books, Harmondsworth, Eng., 1957
- Penguin, Harmondsworth, Eng., New York, 1976
- Puffin Books, Harmondsworth, Eng., 1976
- Penguin Books, Harmondsworth, Eng., 1959, c1956
- Penguin Books, Harmondsworth, Eng., New York, 1977, c1971
- Penguin Books, Harmondsworth, Eng., New York, c1981