It's fairly easy to find the guitar tabs and chords for almost any pop or rock record somewhere on the web. These are usually transcriptions by musicians who have heard the songs and then figured out how they were played. The various sites have a range in quality content, but the best one I have found is Chordie. A really nice feature is that for songs that have been suitably prepared, you can transpose the song right on the site (let's say if you were tring to avoid B chords ...). Let's say you wanted to find the song, oh, I don't know, "Massachusetts" by the Bee Gees. It's here. Make sure you behave and respect the appropriate copyright laws.