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American Geological Institute
The American Ass. of Petroleum
The Society of Petroleum Engineers
American Chemical Society
Elsevier Scientific Publishing CO
American Association of Petroleum Geologists
American Association Of Petroleum Geologists
Blackwell Energy Research
Blackwell Energy Research
Direktorat Paten, Dirjen Hak Kekayaan Intelektual, Departemen Hukum dan Hak Asasi Manusia
Wiryosujono, S and A.J. Barber