@misc{_Kazimierz_[ca, copyright={Public Domain}, howpublished={online}, year={[ca 1931]}, title={Kazimierz Demel}, type={Image}, URL={http://www.rcin.org.pl/Content/79763/PDF/WA058_90756_Demel_P1659.pdf}, keywords={Demel, Kazimierz (1889-1978), Marine station (Hel), biologists, academics, marine biology, Baltic Sea}, }