@misc{Wieland_Johann_Wolfgang_(?-1736)_Principatus_1739,
 author={Wieland, Johann Wolfgang (?-1736) and Homännische Erben},
 copyright={Public Domain},
 address={Norimbergae},
 howpublished={online},
 year={1739 [i.e. 1752]},
 publisher={ab Haeredibus Homannianis, cum spec. S. Caes. Rg. Mai. priv.},
 language={lat},
 title={Principatus Silesiae Grotkani exactissima tabula geographica exhibens terram nissensem simul ac circulos Grotkau, ottmuchau et Ziegenhals},
 keywords={Grodków region, topographical maps, 18th century},
}