The Actual Keys that Tunes are Played In

Hi everyone.
Just friends is in Concert Bb right? Even though in the Real Book its in C (handy for following the tune on tenor of course but I do play some bass too).
Does anyone know of a site or book or something that lists all the common tunes with the keys that they are normally played in (in this Country, if any different to Europe or USA?)
Would be really handy,
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