@misc{_Świadectwo,
 howpublished={online},
 publisher={Polskie Koleje Państwowe},
 language={pol},
 title={Świadectwo Nr. 13 [Grzyb, Tadeusz]},
 type={Official document},
 keywords={Official publications - 1918-1939, The Polish State Railways - 1918-1939 - official publishers, Grzyb, Tadeusz},
}