Leonard J Spencer eBooks
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The World's Minerals. E-book. Formato PDF
Leonard J. Spencer
edizioni Forgotten Books collana , 2017
The natural objects found on the surface of our earth, or within its crust at a moderate distance from the surface, may be conveniently Classified into three great groups or kingdoms — the animal, vegetable, and mineral kingdoms. The two first embrace every thing organic — that is to say, everything that is, or has...