Subject
Geology
8
Arizona
1
Black Mesa (Navajo County and Apache County, Ariz.)
1
Colorado Plateau
1
Copper ores
1
Ecosystem management
1
Geology, Economic
1
Mines and mineral resources
1
Monument Valley (Ariz. and Utah)
1
Navajo Indian Reservation
1
New Mexico
1
New Mexico History
1
Ore deposits
1
Porphyry
1
Zuni Indians
1