Incoming Resources
- Penguin Books, Harmondsworth, Eng., 1971
- Penguin Books, Harmondsworth, Eng., 1959, c1956
- Penguin Books, Harmondsworth, Eng., Baltimore, 1974
- Penguin Books, Harmondsworth, Eng., New York, 1979
- Penguin Books, Harmondsworth, Eng., 1962
- Penguin Books, Harmondsworth, Eng., 1971, c1961
- Penguin Books, Harmondsworth, Eng., 1965
- Penguin Books, Harmondsworth, Eng., New York, 1980, c1949
- Penquin, Harmondsworth, Eng., 1973