11 String Alto Guitar: a revelation in guitar-lute repetoire!
11-String Asturias Alto Classical Harp Guitar, by Wataru Tsuji, Japan
Blues Line ZE Alto Top - Alden Guitars Blues Line ZE Alto Top - Audiofanzine
ALTO GUITAR, GEORG BOLIN, 11 STRINGS, 1981. - Bukowskis
Alto Guitar For Sale - Rare Made In Japan Teruyoshi Kayama hand made Niibori Classical Acoustic Alto Guitar, Music & Media, Music Instruments on Carousell
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New Guitar: 11-String Altgitarr by Georg Bolin, 1980 : r/classicalguitar
Amazon.com: Easy Classical Guitar & Alto Recorder Duets: Featuring music of Bach, Mozart, Beethoven, Wagner and others. For Classical Guitar and Alto/Treble Recorder.In Standard Notation and Tablature.: 9781466307872: Marcó, Javier: Books