@misc{Opatowczyk_Adam_(1574-1647)_Qvæstio, author={Opatowczyk, Adam (1574-1647)}, howpublished={online}, publisher={Jakub Siebeneicher - Dziedzice}, language={lat}, title={Qvæstio De Natvra Materiæ Primæ}, type={starodruk}, }