Santos, David A.
Probability : an introduction
Jones & Bartlett Learning, 2011
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Grimaldi, Ralph
Fibonacci and Catalan numbers : an introduction
John Wiley & Sons, 2012
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Cohen, Daniel I. A.
Basic techniques of combinatorial theory / Daniel I.A. Cohen
John Wiley & Sons, 1978
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Tucker, Alan
Applied combinatorics
John Wiley & Sons, 1980
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Hall, Marshall
Combinatorial theory
John Wiley & Sons, 1986
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