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The rockhound’s guide to California

GBK Butler, Gail CA The rockhound’s guide to California. Falcon, 1995
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Gem trails of California

GBK Mitchell, James R. CA Gem trails of California. Gem Guides, 1986
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Gem trails of Northern California

GBK Mitchell, James R, CA Gem trails of Northern California. Gem Guides, 1995
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Rockhound Barstow

GBK Zzyzx, Justin CA Rockhound Barstow. Forty Seven Press, 2020.
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