@misc{Żurowski_K._Sumin,_1956,
 author={Żurowski, K.},
 editor={Mikołajczyk, G.},
 copyright={Rights Reserved - Restricted Access},
 howpublished={online},
 year={1956},
 language={pol},
 title={Sumin, pow. Lipno. Plan grodziska},
 keywords={archaeology, archaeological site, stronghold, Dobrzyń Land (Poland), Sumin, Lipno county (Poland)},
}