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04 Oil Shales And Tar Sands
1
040500 -- Oil Shales & Tar Sands-- Properties & Composition
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15 Geothermal Energy
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150900 -- Geothermal Engineering
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37 Inorganic
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42 Engineering
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43 Particle Accelerators
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54 Environmental Sciences
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58 Geosciences
1
Accelerators
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