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Published Soil Surveys for California counties. For historical soil surveys (not in the web soil survey) that say 'archived pdf online', information on viewing the maps can be found here.
Print Soil Surveys in the Bioscience Library
Soil surveys shelved in the Soil Survey location.
Issued successively by: Bureau of Soils; Bureau of Chemistry and Soils; Bureau of Plant Industry. Division of Soil Survey; Bureau of Plant Industry, Soils, and Agricultural Engineering; Soil Conservation Service.
Library's collection includes volumes through 2004 containing Soil Surveys for California and neighboring states (OR, WA, ID, NV, UT, AZ, AK, HI, plus Pacific Islands).