Map of El Cajon Valley

1941

El Cajon Valley Chamber of Commerce.

1:31k

Progress Map, California Interstate Highways and Other Portions, January 1963.

1963

California Department of Transportation, Division of Highways

1:1m

National City, San Diego Co.

1887

W.W. Elliott & Co.

(Verso) State Highway Map, California, 1965.

1965

California Department of Public Works, Division of Highways

San Diego, California.

1999

Unique Media Inc.

San Diego Area, California.

1972

Millsap, Darrel

California.

1898

Reynolds & Proctor

1:3m

(Verso) State Highway Map, 1986.

1986

California Department of Transportation (CALTRANS)

(Verso) California State Highways, December 1975.

1975

California Department of Transportation (CALTRANS)

Geologic Map of California, San Diego - El Centro Sheet.

1962

California Division of Mines and Geology

1:250k