@misc{_Jerzy_[1930],
 editor={Michajłow, Włodzimierz (1905–1994). Collector},
 copyright={Public Domain},
 howpublished={online},
 year={[1930]},
 title={Jerzy Ruszkowski and Kazimierz Demel on board the cutter "Ewa"},
 type={Image},
 URL={http://rcin.org.pl/miiz/Content/79696/PDF/WA058_90754_Demel_P1916.pdf},
 keywords={Demel, Kazimierz (1889-1978), Ruszkowski, Jerzy (1887-1934), Markowski, Stanisław (1902-1971), biologists, marine biology, Marine station (Hel), field research},
}