Amazon.com: Cigar Box Guitar Jazz & Blues Unlimited Book Two 4 String: Book Two Chords, Fingerstyle and Theory: Book Two: Chords, Fingerstyle and Theory: 9781777010218: Robitaille, Brent C: Books
3 Alternative Tunings For 4-String Cigar Box Guitar – Beginner Cigar Box Guitar
Four string Cigar box Chord Chart - Cigar Box Nation
Beginner Chords For A 4 String Cigar Box Guitar – Beginner Cigar Box Guitar