Ohio , River, United States
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2009
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Religious Studies, Education, Psychology, History, Literature, Philosophy, Entire Library
...river, United States river, 981 mi (1,579 km...Allegheny and Monongahela rivers in SW Pa., at Pittsburgh...southwest to enter the Mississippi River at Cairo, Ill. The...affected by the rivers industrial pollution ratified (1948) the Ohio River Valley Sanitation Compact...recreational facilities. History The French explorer...