@misc{_Marian,
 editor={Kobylański, Józef Władysław (1893–1971). Collector},
 copyright={Public Domain},
 howpublished={online},
 type={Image},
 title={Marian Adam Liberak},
 URL={http://rcin.org.pl/miiz/Content/115083/PDF/WA058_97939_Liberak_Czuba.pdf},
 keywords={Liberak, Marian Adam (1890-1931), naturalists, foresters, collectors and collecting, environmental activists, citizen activists, journalists},
}