@misc{_Nauczanie_1917-1918,
 copyright={Public Domain},
 address={Warszawa},
 howpublished={online},
 year={1917-1918},
 publisher={[Tadeusz Gutkowski]},
 language={pol},
 language={pol},
 type={Text},
 title={Nauczanie Matematyki i Fizyki R. 2 (1918)},
}