@misc{_[Ploughing_[1938],
 copyright={Rights Reserved - Restricted Access},
 howpublished={online},
 year={[1938]},
 title={[Ploughing of a filed with a tractor] [An iconographic document]},
 keywords={ethnography, material culture, social culture, farming, agriculture, man, field works, ploughing, agricultural machine, tractor, Udórz, Żarnowiec commune (Poland)},
}