Westfälische Aa
The Westfälische Aa ("Westphalian Aa") is a short (8.4 km) river in the Westphalia region of Germany, left tributary of the Werre. It is formed by the confluence of two small streams in Bielefeld-Milse. In its upper part, it is called Johannisbach. It flows into the Werre in Herford.
Coordinates: 52°01′24″N 8°29′44″E / 52.02333°N 8.49556°E
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