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201by Thwaites, Reuben Gold, 1853-1913“...Ohio River Valley Description and travel....”
Published 1975
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202
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203
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204George Mercer papers relating to the Ohio Company of Virginia [in the Darlington Memorial Library] /Published 1954“...Ohio River Valley History Sources....”
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205
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206by McConnell, Michael N. (Michael Norman)“...Ohio River Valley History To 1795....”
Published 1992
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207
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208
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209
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210“...Mississippi River Valley Description and travel....”
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211by Perrin du Lac, M. (François Marie), 1766-1824“...Mississippi River Valley Description and travel....”
Published 1805
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212by Faris, John T. (John Thomson), 1871-1949“...Mississippi River Valley Description and travel....”
Published 1923
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213
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214
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215
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216
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217
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218
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219Published 1979“...Ohio River Valley Antiquities....”
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220