Columbia subject headings:
Sulfur deposits--Environmental aspects--Blue Ridge Mountains Region.
Sulfur deposits--Environmental aspects--Northeastern States.
Water--Composition--Blue Ridge Mountains Region.
Water--Composition--Northeastern States.
Harvard subject headings:
Sulfur deposits--Environmental aspects--Blue Ridge Mountains Region.
Sulfur deposits--Environmental aspects--Northeastern States.
Water--Composition--Blue Ridge Mountains Region.
Water--Composition--Northeastern States.
Princeton subject headings: