Armstrong, James W.
Elements of mathematics
Macmillan, 1976
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Armstrong, James W.
Elements of mathematics
Macmillan, 1970
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Boas, Mary L.
Mathematical methods in the physical sciences
John Wiley & Sons, 1983
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Wheeler, Roger F.
Rethinking mathematical concepts
Ellis Horwood, 1981
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Saaty, Thomas L.
Mathematical methods of operations research
McGraw-Hill, 1959
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