@misc{Wehrmann_Martin_(1861-1937)_Geschichte,
 author={Wehrmann, Martin (1861-1937)},
 address={Gotha},
 howpublished={online},
 publisher={Friedrich Andreas Perthes},
 language={ger},
 title={Geschichte von Pommern. Bd. 1, Bis zur Reformation (1523)},
 type={książka},
}