Bibliography
- Norman Davies, God's Playground: A History of Poland, vol. 1: The Origins to 1795; vol. 2: 1795 to the Present, Oxford, Oxford University Press, 1981, ISBN 0-19-925339-0, ISBN 0-19-925340-4. Chapter two: "The Polish Land", pp. 23–52.
Read more about this topic: Polish Historical Regions