Shaped-Note Singing
Southern Harmony
I believe the subject title should be changed to Shaped-Note Singing as a more general and inclusive title. The music dates back to colonial times and certainly was not limited to the South. Further, 'Southern Harmony' isn't even commonly used in the South, more often called Old Folks Singing or shaped-note music. (Being an amateur on Wikepedia, I didn't want to change the title on my own.)