Chorus America
Phone: 202.331.7577
E-mail: service@chorusamerica.org
http://www.chorusamerica.org/
Click "About Choral Singing" on the menu bar at the top of the page.

International Conference of Symphony and Opera Musicians
http://www.icsom.org
Browse menu topics.

National Alliance for Musical Theater
Phone: 212.714.6668
E-mail: info@namt.org
http://namt.org/

National Endowment for the Arts
Phone: 202.682.5400
E-mail: webmgr@arts.endow.gov
http://www.nea.gov/
Select "Resources," click on "Discipline Resources." Then, select "Music," "Musical Theater," or "Opera."

Voice and Speech Trainers Association
E-mail: pthompso@uci.edu
http://www.vasta.org
Browse articles and menu topics.