Other Useful Links
 
Ultimate Barbershop Links - speaks for itself.
 
Barbershop Wiki - encyclopaedia of barbershop.
 
Free Sheets - links to free sheet music sites including 4-part harmonies and source materials for arrangers (out of copyright sources).
 
singers.com - best site for free / sample tracks from numerous barbershop CD's!!
 
a-cappella.com - despite mis-spelling the name have some good samples.
 
4-cast - podcasts for barbershop enthusiasts.
 
BHS - Barbershop Harmony Society (men) (USA).
 
Sweet Adelines - womens barbershop (USA).