@misc{_Nauczanie_1917-1918,
 copyright={Public Domain},
 address={Warszawa},
 howpublished={online},
 year={1917-1918},
 publisher={[Tadeusz Gutkowski]},
 language={pol},
 type={Text},
 title={Nauczanie Matematyki i Fizyki R. 2 (1918) nr7},
 URL={http://www.rcin.org.pl/Content/9582/PDF/WA35_6170_cz367-r1918-nr7_Nauczanie.pdf},
}