@misc{Zbigniew_Mazur_The_1973,
 author={Zbigniew Mazur},
 address={Poznań},
 year={1973},
 contents={Strona 2},
 publisher={Poznań : IZ,},
 language={pol},
 title={The Pact of Four — How the Original Concept Was Formed in the Years 1931 – 1932},
 type={text},
}