Polish–Teutonic War (1519–1521) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Polish–Teutonic War (1519–1521)" in English language version.

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2books.google.com

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books.google.com

Jerzy Jan Lerski, Piotr Wróbel, Richard J. Kozicki, "Historical dictionary of Poland, 966-1945", Greenwood Publishing Group, 1996, pg. 403, [1]
Jack Repcheck, "Copernicus' Secret: How the Scientific Revolution Began", Simon and Schuster, 2008, pg. 66, [2]