Bibliography
- Lyell, Charles (1830), Principles of Geology 1, London: John Murray, retrieved 2009-01-20
- Lyell, Charles (1832), Principles of Geology 2, London: John Murray, retrieved 2009-01-20
- Lyell, Charles (1833), Principles of Geology 3, London: John Murray, retrieved 2009-01-20
Read more about this topic: Principles Of Geology