@misc{_1968,
 volume={23},
 number={36},
 copyright={Creative Commons Attribution BY 4.0 license},
 journal={Polski Tygodnik Lekarski},
 address={Warszawa},
 howpublished={online},
 year={1968},
 publisher={PZWL},
 language={pol},
 type={Text},
 URL={http://rcin.org.pl./Content/81261/PDF/Obserwacja.pdf},
}