Linea Divisoria Entre Mexico Y Los Estados Unidos. No. 16.

1901

International Boundary Commission

1:60k

74. Alkali Map, Imperial Sheet, California.

1903

Holmes, J. Garnett

1:127k

73. Soil Map, Imperial Sheet, California.

1903

Holmes, J. Garnett

1:127k

Imperial Valley tract map

1914

Rock, Geo H.

1:125k

Metsker's map of Imperial County, California

1942

Chas. F. Metsker

1:127k

Imperial County.

1935

California Division of Highways

1:205k

A Hysterical map of Palm Springs thru the desert country to old Mehiko

1948

Lindgren Brothers

Atomic Airspace Reservations. PLEASE POST IN A CONSPICUOUS PLACE.

1950

U.S. Atomic Energy Commission

Imperial County California. America's Winter Garden

1934

Imperial County Board of Trade

Reconnaissance map of the Salton Sink, California

1906

E.M. Douglas; R.B. Marshall; W. Carvel Hall

1:500k