Bodensee region

http://statistik-bodensee.org/tl_files/statistik/downloads/publikationen/Die%20internationale%20Bodenseeregion%20in%20Zahlen/Die_internationale_Bodenseeregion_in_Zahlen.pdf

https://web.archive.org/web/20140728221457/http://statistik-bodensee.org/tl_files/statistik/downloads/publikationen/Die%20internationale%20Bodenseeregion%20in%20Zahlen/Die_internationale_Bodenseeregion_in_Zahlen.pdf