@misc{Ekdahl_Sven_(1935–_)_The_2007, author={Ekdahl, Sven (1935– )}, copyright={Rights Reserved - Free Access}, address={Łódź}, howpublished={online}, year={2007}, publisher={Instytut Archeologii i Etnologii PAN [Polska Akademia Nauk]}, publisher={Polska Akademia Nauk. Oddział w Łodzi}, language={eng}, title={The siege machines during the Baltic crusades}, type={Text}, URL={http://www.rcin.org.pl/iae/Content/22879/PDF/WA308_34851_PIII348_SIEGE-MACHINES_I.pdf}, keywords={Middle Ages -- north-eastern Europe, Teutonic Order, medieval crusades, medieval siege machines}, }