Incoming Resources
- Penguin, Harmondsworth, Eng., 1976
- Penguin Books, Harmondsworth, Eng., New York, c1981
- Penguin Books, Harmondsworth, Eng., New York, 1976, c1962
- Penguin Books, Harmondsworth, Eng., Baltimore, 1972
- Penguin Books, Harmondsworth, Eng., 1977, c1974