File:The Alleghany and the Monongahela rivers join at Pittsburgh to form the Ohio River.jpg: Revision history

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  • curprev 17:0617:06, 24 March 2021‎ imported>George Swan‎ 320 bytes +320‎ {{Image_Details|pd |description = The Alleghany and the Monongahela rivers join at Pittsburgh to form the Ohio River. |author = USGS |source = https://www.nap.edu/read/11196/chapter/4#22 |date-created = 1995 |pub-country = USA |notes...
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