Walsh, Ronald A.
McGraw-Hill, 1994
Buku Referensi
Morgan, John W., 1946
Springer-Verlag, 1993
Buku Teks SO
Artikel Jurnal
Avrutin, S.
Peace Publishers, [date of publication not identified]
Buku Teks
J. Paulo Davim, editor
Springer Nature, 2019
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