Tipei, Nicolae
Stanford University Press, 1962
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Billett, Michael
Pergamon Press , 1979
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Szeri, A.Z.
New York: McGraw-Hill, [date of publication not identified]
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Cameron, Alastair
Ellis Horwood, 1981
Buku Teks
FAG Kugelfischer Georg Schafer & Co., [date of publication not identified]
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