The Biebrza reference article from the English Wikipedia on 24-Apr-2004
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Biebrza

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Biebrza is a river in north-eastern Poland, a tributary of the Narew river (near Wizna), with a length of 155 kilometres (28th longest) and the basin area of 7,057 sq. km. (7,051 in Poland).

Towns and townships:

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