Bach Well Tempered Clavier for 7 string guitar, volume 2 | ACME Records
Amazon.com: TAB Paper for 7-String Guitar: 200 of TAB Paper for 7-String Guitar (Manuscript Paper for 7-String Guitar): 9781544045931: Klein, Sergio R: Books
9781574243659: The Art of Russian Gypsy Guitar: For 6 & 7 String Guitars - AbeBooks - Timofeyev, Oleg; Kondenko, Fedor: 1574243659
The Idiot's Guide To Extended Range Guitars - 7 & 8-String Guitar Tips
Sweep Picking Speed Strategies for 7-String Guitar: Discover Seven-String Guitar Arpeggios, Techniques and Licks (Learn Rock Guitar Technique): Brooks, Mr Chris, Alexander, Mr Joseph, Pettingale, Mr Tim: 9781789330793: Amazon.com: Books
6 String vs 7 String Guitars Compared (FAQ) - Guitar Gear Finder