Obra
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
Obra
a river in Poland, a left tributary of the Warta. It is 209 km long and drains an area of 6,900 sq km. It flows through a plain in a broad, swampy valley, forming channels and branches. At one point the river divides into two parts and about 40 percent of its runoff enters the Oder (Odra). The largest city along the river is Kościan.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.