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USGS Thesaurus
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USGS Quadrangles
Johnson City
quadrangle 1:250,000 scale
Subtopics
Bristol
Johnson City
Middlesboro
Morristown
See also
Kentucky
Mississippian aquifers
North Carolina
Ohio
Pennsylvanian aquifers
Piedmont and Blue Ridge crystalline-rock aquifers
Tennessee
Tennessee
Valley and Ridge aquifers
Valley and Ridge carbonate-rock aquifers
Virginia
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