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1
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2Published 1981“...International field year for the Great Lakes...”
Government Document Book -
3
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4
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5
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6Published 1903Government Document Map Serial
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7by Croley, Thomas E.Subjects: “...Water levels Great Lakes (North America)...”
Published 2003
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Government Document eBook -
8by Croley, Thomas E.Subjects: “...Water levels Great Lakes (North America)...”
Published 2003
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Government Document Microform Book -
9Published 2013Government Document Map
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10
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11Published 2004Government Document Map
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12Published 2005Government Document Map
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13Published 2002Government Document Map
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14Published 2002Government Document Map
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15Published 2004Government Document Map
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16Published 2014Government Document Map
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17Published 2014Government Document Map
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18
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19Published 2005Government Document Map
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20Published 2006Government Document Map