@misc{Józef_Boroń_Economic_1967,
 author={Józef Boroń},
 address={Poznań},
 year={1967},
 contents={Strona 3},
 publisher={Poznań : IZ,},
 language={pol},
 title={Economic Advancement of the GDR in 1950—1965},
 type={text},
}