Gardner, Robert B.
Society for Industrial and Applied Mathematics, 1989
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Wright, Paul H.
John Wiley & Sons, 2004
Buku Teks
Oglesby, Clarkson H. (Clarkson Hill), 1908-
John Wiley & Sons, 1963
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Singh, Gurcharn
Standard Publishers Distributors, 1978
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Wright, Paul H.
John Wiley & Sons, 1979
Buku Teks