@misc{Bölsche_Wilhelm_(1861–1939)_Eiszeit_1919,
 author={Bölsche, Wilhelm (1861–1939)},
 copyright={Public Domain},
 address={Stuttgart},
 howpublished={online},
 year={1919},
 publisher={Franckh'sche Verlagshandlung},
 publisher={Kosmos, Gesellschaft der Naturfreunde},
 language={ger},
 title={Eiszeit und Klimawechsel},
 type={Text},
 URL={http://rcin.org.pl/Content/211028/PDF/KR171_248290_StZb_B%C3%B6lsche-Eiszeit.pdf},
 keywords={Climatology},
}