Subject
Animals
1
Automobile travel
1
California
1
California National Historic Trail
1
Forest management History
1
Ghost towns
1
Historic sites
1
Mineral industries History
1
Mines and mineral resources History
1
Nevada
1
Nevada Description and travel
1
Nevada History
1
Pioneers History
1
Pony Express National Historic Trail
1
Trails
1
Water-supply
1
Wildfires History
1