Schneider, Erich, author
William Hodge, 1952
Buku Teks
Artikel Jurnal
Ljungqvist, Lars, author
Massachusetts The MIT Press, 2012
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Ahuja, B. N., author
Surjeet Publications , 1993
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Dorodjatun Kuntjoro-Jakti, author
The Hitotsubashi Academy , 1986
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