@misc{Ptaśnik_Jan_(1876-1930)_Die,
 author={Ptaśnik, Jan (1876-1930)},
 howpublished={online},
 publisher={[s.n.]},
 language={ger},
 type={książka},
 title={Die Boner = (Bonerowie)},
 keywords={Bonerowie (ród)},
}