Schaaf, William L.
Basic concepts of elementary mathematics /William L. Schaaf
Wiley-Academy, 1965
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The philosophy of mathematics / Editor by W.D. Hart
Oxford University Press, 1998
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Schaaf, William L.
Our mathematical heritage essays on the nature and culture significance of mathematics / William L. Schaaf
Collier Books, 1966
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Knox, David M., author
Mathematics of finance/ David M. Knox, Petr Zima and Robert L. Brown
McGraw-Hill Book Co., 1990
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Capitulo, Florante M., author
Mathematics of investment : a simplified approach
National Book Store, 1994
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