ONTA (Geology) Coal and Petroleum / Crude Oil Samples.

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1) Introduction2) Basic Coal Rock Set3) Coal Rock Set # 14) Coal Rock Set # 25) Coal & Oil Set # 16) Coal & Oil Set # 27) Basic Oil Rock Set8) Oil Rock Set # 19) Oil Rock Set # 210) Other Oil Rocks11)Basic Crude Oil Set12) Crude Oil Set # 113) Crude Oil Set # 214) Other Crude Oils15) Other Misc. Items16) Related Links17) Contact ONTA

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