This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
CHNB Rheinwaldgletscher Collection Gugelmann GSGUGEBLEULERbSUPPLEMENT.tif Information Creator Johann Ludwig Bleuler Rheinwaldgletscher Rheinwaldgletscher Aquatinta koloriert Swiss National Library CHNBCollection Gugelmann PDold User Swiss National Library GSGUGEBLEULERbSUPPLEMENT helveticarchives ch aspx ID helveticarchives