Southern Methodist University
   http://www.smu.edu/

Barbara Hill-Moore
   http://faculty.smu.edu/bhmoore/

The Fort Bend Boys Choir of Texas
   http://www.fbbctx.org/

Denyce Graves
   http://www.denycegraves.com/

The (Un)official Countertenor Homepage
   http://www.medieval.org/emfaq/performers/countertenors.html

The Countertenor Pages
   http://www.countertenor.demon.co.uk/ct/ctindex.html

Voice Definitions and Ranges
   http://www.medieval.org/emfaq/misc/voices.html

Male Altos (and Sopranos)
   http://www.radix.net/~dalila/singers/counter.html