Columbia subject headings:
Harvard subject headings:
Geology, Economic--New Mexico--Guidebooks.
Geology, Economic--Texas--Guidebooks.
Mines and mineral resources--New Mexico--Guidebooks.
Mines and mineral resources--Texas--Guidebooks.
Princeton subject headings:
Geology--Delaware Basin (Tex. and N.M.)--Guidebooks.
Industrial minerals--Geology--Delaware Basin (Tex. and N.M.)--Guidebooks.