"Monongahela River Watershed (W. Va. and Pa.)" . . "Cumberland River Watershed (Ky. and Tenn.)" . . . . "Tennessee River Watershed." . . "Kanawha River Watershed (W. Va.)" . . . "Ohio River basin"@en . . "Surface water supply of the United States, 1926. Part III, Ohio River Basin"@en . . . . . . . . . . . . . . . . . "Surface water supply of Ohio River Basin, 1926"@en . . . . . . . . . . . . . "Kentucky River Watershed (Ky.)" . .