Piotr Eberhardt
Piotr Eberhardt (December 27, 1935 – September 10, 2020) was a Polish geographer, a professor at the Polish Academy of Science and author of studies in the field of demography and population geography. His works included the ethnic problems of Central and Eastern Europe in the 20th century. He also specialized in the field of geopolitics. Provided by Wikipedia-
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