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articles available from Wikipedia or other free sources online. The
Oberaargau is the region that encompasses the upper watershed of
the Aar River in the canton of Bern in Switzerland. On the north,
lie the Jura Mountains, and on the south the hills leading to the
Emmental Comprising the districts of Wangen and Aarwangen of the
canton of Berne, the Oberaargau will become part of the
administrative region Emmental-Oberaargau on 1 January 2010.