Soil survey of the El Centro area, California /

Mode of access: Internet.

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.

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.

Soil survey of the San Luis Obispo area, California /

Cover title.

Soil survey of the Santa Cruz area, California /

Bibliography: p. 90.

Soil survey of the Shasta Valley area, California /

Done jointly by the Bureau of Soils and the University of California Agricultural Experiment Station.

Soil survey of the Suisun area, California /

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

Soil survey of the Wasco area, California /

Caption title: Soil survey of the Wasco area, California.

Soil survey of the Willits area, California /

"Advance sheets--Field Operations of the Bureau of Soils, 1918."

Soil survey of the Clear Lake area, California.

In cooperation with the University of California Agricultural Experiment Station.

Soil survey of the Coachella Valley area, California /

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

Soil survey of the Sacramento-San Joaquin Delta area, California /

"Report no. 21."

Soil survey of the Visalia area, California /

R. Earl Stories, in charge, and Bruce C. Owen, University of California, and E.J. Carpenter, M.H. Layton and W.J. Leighty, Soil Survey Division, Bureau of Chemistry and Soils, United States Department of Agriculture.

Soil survey of the Modesto-Turlock area, California, with a brief report on a reconnaissance soil survey of the region east of the area,

Mode of access: Internet.