Rockhounding Oregon : A Guide to the State's Best Rockhounding Sites
Lars W. Johnson
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Practical Geologist : How to Apply Primitive Skills for Everyday Use
Garret Romaine
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Rockhounding Texas : A Guide to the State's Best Rockhounding Sites
Martin Freed
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Chasing the Ghost Bear : On the Trail of America's Lost Super Beast
Mike Stark
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Ressources minerales et transitions : Trajectoires politiques du sous-sol francais au 21eme siecle
Chailleux Sebastien Chailleux
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Ressources minerales et transitions : Trajectoires politiques du sous-sol francais au 21eme siecle
Chailleux Sebastien Chailleux
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The Smithsonian National Gem Collection-Unearthed : Surprising Stories Behind the Jewels
Post Jeffrey Edward Post
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