Diatonic chords in every key, major and minor, with functions

The triads and seventh chords on every degree of the twelve major keys and of their relative minors, natural, harmonic and melodic, written on the staff. Over each chord is its symbol; under it, its roman numeral and its function: tonic, subdominant or dominant. For learning the chords of a key, analysing a song and finding its chords in any key.