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Production place
- Bolivian Chaco, Bolivia22
- CA-Ker-38, Goose Lake area, Kern County11
- Cerro de las Monjas, Marcahuamachuco, Northern Peru11
- Luzon Island, Luzon island group, Philippines9
- CA-Ker-46, Goose Lake area, Kern County7
- CA-Ker-47, Kern County, California7
- Carneros Rocks, Kern County, California7
- Torres-Martinez Reservation, Riverside County, California7
- CA-Ker-37, Goose Lake area, Kern County5
- Marcahuamachuco, Huamachuco District, Northern Peru5
- 2 miles below Weitchpec, Klamath River, Humboldt County4
- CA-Ker-33, Kern County, California4
- CA-SRI-147, Santa Rosa Island, Channel Islands4
- Klamath River, Humboldt County, California3
- Stone Lagoon, Humboldt County, California3
- Trinity River, Humboldt County, California3
- CA-Ker-35, Kern County, California2
- Freshwater Lagoon, Humboldt lagoons, Humboldt County2
- Hostler Ranch, Hoopa Valley, Humboldt County2
- Pots Valley, Santa Catalina Island, Channel Islands2