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Exotic Gems: Volume 1 -- How...
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Rockhounding Oregon: A Guide...
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Earth Treasures, Vol. 4B:...
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A Grain of Sand: Nature's...
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Rocks and Minerals
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Helen Pellant (Editor)
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Rocks and Minerals
Chris Pellant,
Helen Pellant
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Fossils: The Key to the Past
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Earth Treasures, Vol 3: The...
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World Encyclopedia of Fossils...
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