Spiess, Eliot B., author
John Wiley & Sons, 1983
Buku Teks
Spiess, Eliot B., author
John Wiley & Sons, 1977
Buku Teks
Wallace, Bruce, 1920-, author
Columbia University Press, 1981
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Artikel Jurnal
Finlay, Graeme, 1953-, author
Cambridge University Press, 2013
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