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Petroleum geology (Tpngn)

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Disciplines (T)
    Science (Tp)
        Earth sciences (Tpn)
             Use For: Geosciences
            Geology (Tpng)
                Geochemistry (Tpngb)
                Geological oceanography (Tpngd)
                     Use For: Marine geology
                Geomorphology (Tpngf)
                Petrography (Tpngj)
                Petroleum geology (Tpngn)
                Petrology (Tpngp)
                Soil science (Tpngq)
                     Use For: Pedology
                Stratigraphy (Tpngr)
                Tectonics (Tpngu)