Soil survey of Imperial County, California, Imperial Valley Area. - Zimmerman, Robert P.; Imperial Irrigation District (Calif.); California Agricultural Experiment Station.; United States. (U.S. Dept. of Agriculture, Soil Conservation Service, 1981)
Item 102-B-5
"Issued October 1981"--P. iii.
"In cooperation with University of California Agricultural Station and Imperial Irrigation District."
Cover title.
Bibliography: p. 59
Keywords: Soil surveys / Imperial Valley (Calif. and Mexico); Soil surveys / California / Imperial County.; Soils / Imperial Valley (Calif. and Mexico) / Maps.; Soils / California / Imperial County / Maps.