1. Searles Valley Minerals, 3200 Main Street, Trona, California 93562, USA
2. Department of Geological Sciences, The University of Texas at El Paso, 500 W University Avenue, El Paso, Texas 79902, USA
3. Landau Associates, 2107 South C Street, Tacoma, Washington 98402, USA
4. Department of Geological Sciences, California State University, Fullerton, 800 North State College Boulevard, Fullerton, California 92831, USA
5. UNAVCO, 6350 Nautilus Drive, Boulder, Colorado 80501, USA