Geographic Subject
California
43
Klondike River Valley (Yukon)
4
Mexico
3
San Francisco (Calif.)
3
United States
3
Alaska
2
Oregon
2
Russia (Federation)
2
Russian Far East
2
West (U.S.)
2
Africa
1
Africa, Southern
1
Amur River Region (China and Russia)
1
Baja California (Mexico)
1
El Dorado County (Calif.)
1
Humboldt County (Calif.)
1
Omolon River Valley (Russia)
1
Pacific States
1
Panama
1
Southwest, New
1
Trinity County (Calif.)
1
Tulare (Calif.)
1