@misc{Sorge_Ernst_(1899–1946)._Autor_Mit_copyright,
 author={Sorge, Ernst (1899–1946). Autor and Drei Masken Verlag. Wydawca},
 copyright={Public Domain},
 address={Berlin},
 howpublished={online},
 year={copyright 1933},
 publisher={Drei Masken Verlag},
 language={ger},
 title={Mit Flugzeug, Faltboot und Filmkamera in den Eisfjorden Grönlands : Erlebnisse mit Knut Rasmussen und Ernst Udet},
 type={Text},
 URL={http://rcin.org.pl/Content/159969/PDF/WA_172405_PTG5722-r1933_Mit-Flugzeung-Faltbo.pdf},
 keywords={Greenland, glaciology, travels, geographical descriptions, geography, habits, German exploration, German discoveries},
}