German atrocities committed against Polish prisoners of war

1998, p. 77. Piotrowski 1998. Ministry of Foreign Affairs, Nazi German Camps on Polish Soil During World War II. Ferguson 2006, p. 417. Borodziej 2006

The Polish Underground and the Jews, 1939–1945. Cambridge University Press via Google Books. "The Provinces of Poland on the Eve of World War II," pp