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AMERICAN, Institute Of Chemcal Engineers
American petroleum institute
American petroleum institute
American Association of Petroleum Geologists
Direktorat Paten, Dirjen Hak Kekayaan Intelektual, Departemen Hukum dan Hak Asasi Manusia
American Association of Petroleum Geologists
Vch P ublishers Inc Derfield Bach
Vch Publishers Inc Derfield Bach
American Association of Petroleum Geologists
Mc.Graw Hill Publishing Company
Society of Economic Paleontologists and Mineralogists
The Society of Petroleum Engineers
The Clay Minerals Society