Schaaf, William L.
Basic concepts of elementary mathematics /William L. Schaaf
Wiley-Academy, 1965
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Montague, Harriet F.
The significance of mathematics
Charles E. Merrill, 1963
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Young, Frederick H.
The nature of mathematics
John Wiley & Sons, 1968
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Smith, Karl J.
The nature of modern mathematics
Brooks/Cole, 1973
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Boas, Mary L.
Mathematical Methods In The Physical Sciences / Mary L. Boas
John Wiley & Sons, 1983
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