File:Progression of three chords (C F G7, I-IV-V) in major-thirds tuning for six-string guitar.svg - Wikimedia Commons
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Jazz Guitar Lessons: Jazz Chord Substitution Part Two (Altered Chords, Theory, Charts, Videos) - Spinditty
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File:Progression of three chords (C F G7, I-IV-V) in major-thirds tuning for six-string guitar.svg - Wikimedia Commons
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