1. University of California Cooperative Extension, Ventura, CA 93003
2. Rutgers Cooperative Extension of Salem County, Woodstown, NJ 08098
3. Department of Botany and Plant Sciences, University of California, Riverside, CA 92521
4. Department of Environmental Sciences, University of California, Riverside, CA 92521
5. South Coast Air Quality Management District, Science & Technology Advancement, Diamond Bar, CA 91765