If you want a handy chord reference chart then try this one by Madonna Woods. This chart shows chords three ways: photos, diagrams, and notes. This chart also has explainations of how chords are built. All major, minor, 7th, and augmented chords are explained. This chart simplifies diminished chords so they are easier to understand. Plus chords and pedals on organs are also addressed. This chart will end the confusion over how to play chords. 51 chords are shown in this handy format for quick reference. 4 pages.