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American petroleum institute
American petroleum institute
American petroleum institute
Direktorat Paten, Direktorat Jenderal Hak Kekayaan Intelektual, Departemen Hukum dan Hak Asasi Manus
The American Chemical Society
The American Chemical Society
American Institute Of Chemical Engineers
American Chemical Society
M. Friedman, Elsevier Science Publisher
M. Friedman, Elsevier Science Publisher