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American petroleum institute
American petroleum institute
Direktorat Paten, Dirjen Hak Kekayaan Intelektual, Departemen Hukum dan Hak Asasi Manusia
American Association of Petroleum Geologists
Vch Publishers Inc Derfield Bach
American Association of Petroleum Geologists
The Society of Petroleum Engineers
The Clay Minerals Society
M. Friedman, Elsevier Science Publisher