Columbia subject headings:
Harvard subject headings:
Appalachian Basin--Charts, diagrams, etc.
Appalachian Basin--Maps.
Formations (Geology)--Appalachian Basin--Charts, diagrams, etc.
Formations (Geology)--Appalachian Basin--Maps.
Geology, Stratigraphic--Maps
Petroleum--Geology--Appalachian Basin--Charts, diagrams, etc.
Petroleum--Geology--Appalachian Basin--Maps.
Princeton subject headings:
Appalachian Basin--Charts, diagrams, etc.
Appalachian Basin--Maps.
Formations (Geology)--Appalachian Basin--Charts, diagrams, etc.
Formations (Geology)--Appalachian Basin--Maps.
Geology, Stratigraphic--Maps.
Maps.
Petroleum--Geology--Appalachian Basin--Charts, diagrams, etc.
Petroleum--Geology--Appalachian Basin--Maps.