Artikel Jurnal
edited by C.E. Hormaeche, C.W. Penn, C.J. Smyth
Cambridge University Press, 1992
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Peacock, James
Prentice-Hall, 1980
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Gourou, Pierre
Longmans, Green and Co., 1954
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Chambliss, William J., author
McGraw-Hill, 1975
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