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1Published 1986“...Ohio Maps....”
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2Ashtabula, Ohio-Pennsylvania : 1:100 000-scale planimetric map 30 x 60 minute series (planimetric) /Published 1986“...Ohio Maps....”
Government Document Map -
3Published 1828“...Chesapeake and Ohio Canal...”
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4Published 1828“...Chesapeake and Ohio Canal...”
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5Published 1989“...Ashtabula, Ohio-Pennsylvania....”
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6Published 1989“...Youngstown, Ohio-Pennsylvania....”
Government Document Map -
7by Dwight, Margaret Van Horn, 1790-1834“...Ohio Description and travel....”
Published 1912
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8Published 1906“...Coraopolis and Osborne Bridge Co. to bridge Ohio River in Pennsylvania...”
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11Published 1961Subjects: “...Limnology Ohio River....”
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13Published 1987Subjects: “...Wetlands Ohio....”
Government Document Microform Map -
14Published 1987Subjects: “...Wetlands Ohio....”
Government Document Microform Map -
15Published 1833Subjects: “...Canals Ohio....”
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16by Katzenberger, George A. (George Anthony), 1867-Subjects: “...Mayors Ohio Cincinnati Biography....”
Published 1990
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17Published 1832“...Chesapeake and Ohio canal. Memorial of inhabitants of Pennsylvania for...”
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18Published 1986“...Ohio Maps....”
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19Published 1941“...Mahoning River (Ohio and Pa.)...”
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20Published 1961“...Pennsylvania-Ohio compact, Pymatuning Lake...”
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