Incoming Resources
- Penguin Books, Harmondsworth, Eng., Baltimore, Md., 1963
- Penguin Books, Harmondsworth, Eng., New York, 1986, c1966
- Penguin Books, Harmondsworth, Eng., New York, 1976
- Penguin Books, Harmondsworth, Eng., New York, c1981
- Puffin Books, Harmondsworth, Eng., 1976
- Penguin, Harmondsworth, Eng., New York, 1976
- Penguin Books, Harmondsworth, Eng., New York, 1979
- Penguin Books, Harmondsworth, Eng., New York, N.Y., 1995, c1961
- Penguin, New York, Harmondsworth, Eng., 1985
- Penguin Books, Harmondsworth, Eng., New York, 1977
- Penguin Books, Harmondsworth, Eng., New York, 1978