The Ultimate Vocal Group Harmony book by Dennis Holran
VGHA Vocal Group Harmony Association
Weinstein JCC presents HARMONY, Altria Theater
Harmony Singing 101 - Interactive Website
Hire Female Vocal Group - Vocal Harmony Group
THE VOCAL GROUP HARMONY WEB SITE
Various Artists - Better Place (Reunion) (From TROLLS Band
Vocal Harmony Groups Prior to 1940
VGHA Vocal Group Harmony Association