Search for: [References = %2220. Ptak M.%2C 2013a%2C Lake evolution in the %C5%BBnin region in the years 1912%5C-1960 %5C(Central Poland%5C)%2C Questiones Geographicae%2C 32%2C 1%2C s. 21%5C-26.%22]

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