@misc{_Kalendarz_1931,
 copyright={Public Domain},
 address={Warszawa},
 howpublished={online},
 year={1931},
 publisher={nakł. Wydaw. "Gospodarz Polski"},
 language={pol},
 type={Text},
 title={Kalendarz Gospodarza Polskiego na rok...},
 URL={http://rcin.org.pl./Content/41663/PDF/WA248_53065_P-I-1448_kalend-gospodarz_o.pdf},
 keywords={Polish calendars - 1918-1939},
}