peterhelmeberbach druckgraphische ortsansichten des wallis 1850-1899 und nachtrag 1600-1849 ANTON GATTLEN Sitten (Sion/Valais) google books :::: https://sites.google.com/view/he1m/home ::::: https://web.archive.org/web/20091115161911/http://www.polygraphicum.de/refs.html

GOOGLE BOOKS peter helm eberbach

peterhelmeberbach druckgraphische ortsansichten des wallis google books https://sites.google.com/view/he1m/home <> https://web.archive.org/web/20091115161911/http://www.polygraphicum.de/refs.html