References
- Bonner , N. A. , Bazan , F. and Camp , D. C. 1975 . Trace element analysis using X‐ray fluorescence . Chem. Instr. , 6 (1) : 1 – 36 .
- Mayberry, Keith, University of California Agricultural Service, El Centro, Calif., private communication (March 1976).
- Mayberry, Keith, University of California Agricultural Service, El Centro, Calif., private communication (April 1977).
- Palmer , T. D. 1975 . Characteristics of Geothermal Wells Located in the Salton Sea Geothermal Field, Imperial County, California. , Livermore, CA : Lawrence Livermore Laboratory . UCRL‐51976
- Riesenhower , R. June 1978 . Soil and Plant Tissue Testing in California , Bulletin No. 1879 June , Berkeley, Calif. : University of California Publications .
- Rosenfeld , Irine and Beath , O. A. 1964 . Selenium: Geobotany, Biogeochemistry, Toxicity and Nutrition , New York : Academic Press .