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Geology of the San Francisco Bay Region

GEO Sloan, Doris CA Geology of the San Francisco Bay Region. UC, 2006
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Geology of Reef Ridge, Coalinga District

GEO Stewart, Ralph CA Geology of Reef Ridge, Coalinga District, California. USGS, 1946
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Color encyclopedia of gemstones

GEMS Arem, Joel E. Color encyclopedia of gemstones. Van Nostrand Reinhold, 1977
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Gems and jewelry

GEMS Arem, Joel Gems and jewelry. Grosset & Dunlap, 1975
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