Healing sounds Tibetan & Mongolian overtone chanting; ancestral lines, family fields,healing vibrations workshops. http://www.innersound.co.uk/

Purce, Jill: The Healing Voice Mongolian overtone chanting, breathing and chanting techniques. http://www.jillpurce.com/

Cole, Jim and Spectral Voices Blendings in vast reverberant spaces to create vocal spacemusic. Includes sound clips, performance updates, and ordering information. http://www.spectralvoices.com/

A Miraculous Method of Singing Article by Sami Jansson on throat singing in South Siberia, with bibliography. http://www.cc.jyu.fi/~sjansson/throat.htm

Rees, Ariane Singing training and vocal coaching with profesional singer. Overtone chant, singing in pregnancy and breath control workshops for personal growth and development. http://www.arianerees.com/

Overtones Researches Articles in English and French by Trân Quang Hai and others. http://membres.lycos.fr/tranquanghai/overtones_index.html

The Throat Singers of Tuva Scientific American's feature article of September 1999. http://www.sciam.com/article.cfm?articleID=00080AA2-BA32-1C73-9B81809EC588EF21

The Universe of Harmonic Chant The official site of David Hykes and the Harmonic Choir, whose music is derived from Asian overtone singing, includes biographies, CD shop, news, reviews, and calendar of concerts and teaching events. http://www.harmonicworld.com

Yahoo! Groups : ba-acappella San Francisco Bay Area A Cappella Community. http://groups.yahoo.com/group/ba-acappella/