@misc{Mayer_Tobias_(1723–1762)_Helvetia_1751,
 author={Mayer, Tobias (1723–1762)},
 copyright={Public Domain},
 address={Norimbergae},
 howpublished={online},
 year={1751},
 publisher={Luci publicae tradita ab Homannianis Heredibvs},
 language={lat},
 language={fre},
 title={Helvetia Tredecim Statibvs Liberis quos Cantones vocant composita Una cum foederatis & subjectis Provinciis},
 type={Image},
 URL={http://www.rcin.org.pl/igipz/Content/180146/PDF/WA51_193695_PTGB1619-10-r1751_Helvetia-Tredecim-St_00000001.pdf},
 keywords={chorographic maps, Switzerland},
}