@misc{Józef_Burszta_Social_1966,
 author={Józef Burszta},
 address={Poznań},
 year={1966},
 contents={Strona 4-5},
 publisher={Poznań : IZ,},
 language={pol},
 title={Social and Cultural Categories of the Population of the Western Territories},
 type={text},
}