@misc{Jacobsen_Johann_Adrian_(1853–1947)_Die_1931, author={Jacobsen, Johann Adrian (1853–1947) and Jansen, Albrecht. Red.}, copyright={Public Domain}, address={Leipzig}, journal={Reisen und Abenteuer}, howpublished={online}, year={1931}, publisher={F. A. Brockhaus}, language={ger}, title={Die weisse Grenze : Abenteur eines alten Seebären rund um den Polarkreis}, type={Text}, URL={http://rcin.org.pl/igipz/Content/179839/PDF/WA51_191157_PAN28037-r1931_Die-weisse-Grenze.pdf}, keywords={travels, geographical descriptions, civilization, Jacobsen Johann Adrian, Arctic peoples, Greenland, Alaska (Unied States; state), Spitsbergen, Sachalin (Russia; island)}, }