Imperial Valley tract map

1914

Rock, Geo H.

1:125k

Irrigation district and road map, Imperial Valley

1914

Rock, Geo H.

1:180k

Metsker's map of Imperial County, California

1942

Chas. F. Metsker

1:127k

Salton Sea

1985

1:100k

Salton Sea

1985

1:100k

El Centro

1989

1:100k

Holtville

1907

1:125k

Holtville

1907

1:125k

Holtville

1907

1:125k

Holtville

1907

1:125k