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Buku Referensi
Platts, John T., author
Sampson Low, Marston, 1959
Buku Referensi
Agrawal, Giriraj Sharan, author
Diamond pocket books, 2001
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Texnika, 1993
Buku Referensi
I Gusti Made Sutjaja, author
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Buku Referensi