Drazen, Erica L., author
Springer, 1995
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Drazen, Erica L., author
New York, Springer, 1995.,
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Walford, Robert B.
Addison-Wesley Publishing Company, Inc., 1990
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Lucas, Henry C., author
McGraw-Hill, 1981
Buku Teks
Springer-Verlag, 1995
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