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Includes parts of Saint Louis County (Missouri) and of Madison and Saint Clair Counties (Illinois).
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Scale:
1:62,500 : Polyconic proj. : W 90¦30'--W 90¦00'/N 38¦45'--N 38¦30'
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Mapmaker:
Geological Survey (U.S.)
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Published:
[Washington, D.C.] : The Survey
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