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Majalah, Jurnal, Buletin
Technology Review, Inc,
Majalah, Jurnal, Buletin
Faculty of Engineering. Universitas Indonesia, 2010
Majalah, Jurnal, Buletin
American Society of Mechanical Engineers, 2018
Majalah, Jurnal, Buletin
Symposium on Appropriate Technology. November 30, 1976, Jakarta
Jakarta: University of Indonesia, 1977
Buku Teks