Dirichlet's theorem on prime density [closed]

Does anyone knows where I could find the proof of Dirichlet's theorem on the analytic density of primes congruent to a certain integer $m$, which turns out to be $\frac{1}{\varphi(m)}$?

Thanks a lot.

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closed as too localized by quid, Chandan Singh Dalawat, GH from MO, Igor Rivin, Emil JeřábekMar 14 '12 at 12:29

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Book by Harold Davenport "Multiplicative number theory" has a very nice exposition. – Boris Bukh Mar 14 '12 at 10:31
I voted to close this question. This is a very wellknown result and contained in plenty of textbooks and lecture notes on the subject. To just find some proof of it seems easy enough. – quid Mar 14 '12 at 11:16
A proof that the density of primes congruent to $m$ (modulo some $N$ presumably) is $1/\phi(m)$ is unlikely to be found anywhere. – Sean Eberhard Mar 14 '12 at 13:50