Incoming Resources
- Penguin Books, Harmondsworth, Eng., 1971
- Penguin Books, Harmondsworth, Eng., Baltimore, 1972
- Penguin Books, Harmondsworth, Eng., New York, ©1966
- Penguin Books, Harmondsworth, Eng., Baltimore, Md., 1973
- Penguin Books, Harmondsworth, Eng., New York, c1981
- Penguin Books, Harmondsworth, Eng., New York, 1978
- Penguin Books, Harmondsworth, Eng., Baltimore, Md., 1966