Where can i find a guitar encyclopedia? (on the computer)?

Im going a project on guitars through the ages and i need solid info like how it works what wood ect but im stuck for a good site… any suggestions?

wikipedia

Chromatic Scale 3 Notes Per String – DP’s Guitar Visual Encyclopedia

Encyclopedia Of The Insane $5.85 …

Hal Leonard Guitar Chord Encyclopedia (DVD) $4.57 Hal Leonard is elated to be the first company to take the concept of a chord book to DVD format! Beginning with helpful notes on how to use the disc, choose the best voicings and construct chords, this extensive resource for all playing styles and levels features five easy-to-play voicings of 44 chord qualities for each of the twelve musical keys, for a whopping total of 2,640 chords in all! For …

The Complete Guitar Player CD Chordfinder (Chord Encyclopedia not included) Tracklist:~~1. Tuning tone~~~2-99. Three chords demonstrated on each track. Demonstrations of nearly 300 chord examples, shown and explained in the matching Chord Encyclopedia, not included….

Deluxe Encyclopedia of Jazz Guitar Runs, Fills, Licks & Lines …

Mel Bay presents Guitar CHords Encyclopedia $6.51 GUITAR CHORDS ENCYCLOPEDIA – DVD Movie…

Guitar Chord Encyclopedia $31.71 …