College of Arts and Sciencescas.umw.edu/dean/files/2015/09/Konieczny_Mathematics.pdf · [6] A.H....
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College of Arts and Sciencescas.umw.edu/dean/files/2015/09/Konieczny_Mathematics.pdf · [6] A.H. Clifford and G.B. Preston, The Algebraic Theory of Semigroups, Mathematical Surveys,