Algebraic number theory by Jarvis, Frazer

A course in analytic number theory by Overholt, Marius

Number theory a historical approach by Watkins, John J.

Quadratic irrationals an introduction to classical number theory by Halter-Koch, Franz 1944-

Computational number theory and modern cryptography by Yan, Song Y.

Number, shape, and symmetry an introduction to number theory, geometry, and group theory by Herrmann, Diane L. 1953-

Relative price effects on decompositions of change in aggregate labor productivity by Dumagan, Jesus C.

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Multiple-base number system theory and applications by Dimitrov, Vassil

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50th IMO 50 years of International Mathematical Olympiads

Elementary number theory by Burton, David M.