en.wikipedia.org
en.wikipedia.org
thecollector.com
swissinfo.ch
britannica.com
worldpopulationreview.com
World Population Review
https://worldpopulationreview.com › countries › switzerland › history
britannica.com
eda.admin.ch
nationsonline.org
Nations Online Project
https://www.nationsonline.org › oneworld › History › Switzerland-history.htm
history-maps.com
britannica.com
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