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Soil survey of Imperial County, California, Imperial Valley Area.

APA Citation

Zimmerman, R. P., Imperial Irrigation District (Calif.)., California Agricultural Experiment Station., United States. Soil Conservation Service. (1981). Soil survey of Imperial County, California, Imperial Valley Area. [Washington, D.C.?]: U.S. Dept. of Agriculture, Soil Conservation Service.

MLA Citation

Zimmerman, Robert P, Imperial Irrigation District (Calif.), California Agricultural Experiment Station, and United States. Soil Conservation Service. Soil Survey of Imperial County, California, Imperial Valley Area. [Washington, D.C.?]: U.S. Dept. of Agriculture, Soil Conservation Service, 1981.

Warning: These citations may not always be complete (especially for serials).