@misc{Voelkel_Carl_(1865–1925)_Grundzüge_1914,
 author={Voelkel, Carl (1865–1925)},
 copyright={Public Domain},
 address={Berlin},
 howpublished={online},
 year={1914},
 publisher={J. Guttentag},
 language={ger},
 title={Grundzüge der preußischen Bergrechts : systematisch dargestellt},
 URL={http://www.rcin.org.pl/Content/5708/PDF/WA308_8391_II7759_GRUNDZUGE-DER-PREUSS_I.pdf},
 keywords={19th-20th c. -- Prussia, Poland, mining -- 19th-20th century, mines -- 19th-20th century, history of Prussian law, mining law in 19th-20th century},
}