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

Imperial Valley tract map

1914

Rock, Geo H.

1:125k

73. Soil Map, Imperial Sheet, California.

1903

Holmes, J. Garnett

1:127k

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

Automobile road map of Imperial County, California

1930

Automobile Club of Southern California. Neyhart, A. P.

1:300k

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