Columbia subject headings:
Clay minerals--Guidebooks.
Geology--New Mexico--Socorro--Guidebooks.
Mines and mineral resources--New Mexico--Socorro--Guidebooks.
Harvard subject headings:
Clay minerals--Congresses.
Geology--New Mexico--Socorro County--Guidebooks.
Princeton subject headings:
Clay minerals--Guidebooks.
Geology--New Mexico--Socorro--Guidebooks.
Mines and mineral resources--New Mexico--Socorro--Guidebooks.