South of Somerton

1990

1:24k

South of Yuma

1964

1:63k

Gadsden

1965

1:24k

Gadsden

1965

1:24k

Somerton

1965

1:24k

Somerton

1965

1:24k

California - Arizona

1905

U. S. Geological Survey

1:125k

Yuma

1940

1:63k

Yuma

1940

1:63k

Yuma

1940

1:63k