Soil survey of the El Centro area, California /

Mode of access: Internet.

Soil survey of the Redding area, California /

At head of title: U.S. Department of Agriculture, Bureau of Soils.

Soil survey of the San Fernando Valley area, California /

U.S. Department of Agriculture, Bureau of Soils in cooperation with the University of California Agricultural Experiment Station.

Reconnoissance soil survey of the San Francisco Bay region,California /

Mode of access: Internet.

Soil survey of the Merced Area, California /

At head of title: Department of Agriculture, Bureau of Soils ... in cooperation with the University of California Agricultural Experiment Station.

Soil survey of the Colusa area, California /

At head of title: U.S. Department of Agriculture, Bureau of Soils.

Soil Survey of the Grass Valley area, California /

U.S. Department of Agriculture, Bureau of Soils in cooperation with the University of California Agricultural Experiment Station.

Reconnoissance soil survey of the lower San Joaquin Valley, California /

At head of title: U.S. Department of Agriculture, Bureau of Soils.

Soil survey of the Porterville Area, California,

At head of title: U.S. Department of Agriculture, Bureau of Soils.

Soil survey of the Marysville area, California /

At head of title: U.S. Department of Agriculture, Bureau of Soils.

Soil survey of the Pajaro Valley, California /

Accompanied by: Soil map, Pajaro Valley sheet, California.

Soil survey of the Los Angeles area, California /

"Advance sheets - Field operations of the Bureau of Soils, 1904."

Soil survey of the Alturas area, California /

United States Department of Agriculture, Bureau of Chemistry and Soils in cooperation with the University of California Agricultural Experiment Station.

Soil survey of the Ukiah area, California /

"Advance sheets--field operations of the Bureau of Soils, 1914."

Soil survey of the Santa Barbara area, California /

United States Department of Agriculture in cooperation with the University of California Agricultural Experiment Station.