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Handbook of fluorescent gems and minerals : an exposition and catalog of the fluorescent and phosphorescent gems and minerals, including the uses of ultraviolet light in the earth sciences
DeMent, Jack
Bok Engelsk 1949
Handbook of uranium minerals : an exposition and catalog of the uranium and thorium minerals, including their occurrence, detection, location and exploration : a guide for the prospector and miner
DeMent, Jack
Bok Engelsk 1948