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Oil and gas : Estimation of discovered reserves
Adelman, Morris Albert, (1983)
Morocco : promising oil reserves
Al-Saadi, Moussa, (1979)
Kohlen, Erdöl und Erdgas, Salze, Erze und Minerale
Stork, Gerd-Henrich, (1973)
Oil in USSR energy : a simulation analysis
Eskin, V. I., (1990)