@misc{Protzen_Gottfried_Carl_Otto_(1868–1925)._Autor_Vom_1922,
 author={Protzen, Gottfried Carl Otto (1868–1925). Autor and Georg-Westermann-Verlag. Wydawca},
 copyright={Public Domain},
 address={Braunschweig},
 address={Hamburg},
 howpublished={online},
 year={1922},
 publisher={Georg Westermann},
 language={ger},
 title={Vom Schwarzwald zum Schwarzen Meer : eine Kajakfahrt donauabwärts},
 type={Text},
 URL={http://rcin.org.pl/Content/120965/PDF/WA51_146098_PTG12412-r1922_Vom-Schwarzwald-zum.pdf},
 keywords={canoeing, personal relations, Europe, Danube River},
}