Niven, Ivan Morton, 1915-
An introduction to the theory of numbers
John Wiley & Sons, 1991
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Shapiro, Harold N.
Introduction to the theory of numbers
John Wiley & Sons, 1983
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Adams, William W.
Introduction to number theory
Prentice-Hall, 1976
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Flath, Daniel E.
Introduction to number theory
John Wiley & Sons, 1989
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Ireland, Kenneth F.
A Classical introduction to modern number theory
Springer-Verlag, 1990
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