@misc{Żytkowicz_Leonid_(1910–1991)_An_1968,
 author={Żytkowicz, Leonid (1910–1991)},
 volume={18},
 editor={Rusiecka, Hilda Andrews-. Tr.},
 editor={Institute of History of the Polish Academy of Sciences},
 copyright={Rights Reserved - Free Access},
 address={Wrocław},
 journal={Acta Poloniae Historica},
 howpublished={online},
 year={1968},
 publisher={Zakład Narodowy im. Ossolińskich},
 language={eng},
 type={Text},
 title={An Investigation into Agricultural Production in Masovia in the First Half of the 17th Century},
 URL={http://www.rcin.org.pl/Content/5535/PDF/WA303_19110_1968-18_APH_07.pdf},
 keywords={agriculture, Mazowsze, Poland 17th c., folwark system, grain trade},
}