@misc{Mayer_Theodor_Heinrich_(1884–1949)._Autor_Im_copyright,
 author={Mayer, Theodor Heinrich (1884–1949). Autor and Universum-Verlags-Gesellschaft (Wiedeń). Wydawca},
 copyright={Public Domain},
 address={Wien},
 howpublished={online},
 year={copyright 1947},
 publisher={Universum Verlagsgesellschaft},
 language={ger},
 title={Im ewigen Eis : aus der Geschichte der Polarforschung},
 type={Text},
 URL={http://rcin.org.pl/Content/124363/PDF/WA51_151159_PAN13773-r1947_Im-ewigen-Eis-aus.pdf},
 keywords={polar regions, North Pole, South Pole, exploration, discoveries, history},
}