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HUGHES, P. C. and R. B. Rickards
American petroleum institute
American petroleum institute
Direktorat Paten, Dirjen Hak Kekayaan Intelektual, Departemen Hukum dan Hak Asasi Manusia
The American Chemical Society
American Association of Petroleum Geologists
The American Institute of Physics
The American Chemical Society
American Institute Of Chemical Engineers
Society of Automotive Engineers Inc
Paleontological Research Institution
The Society of Petroleum Engineers