American String Teachers Association
Phone: 703.279.2113
Fax: 703.279.2114
E-mail: asta@astaweb.com
http://www.astaweb.com/
Click on an area of interest. Note that there are student chapters of this association.

The Violin Society of America
Phone: 845.452.7557
E-mail: info@vsa.to
http://www.vsa.to/

International Society of Bassists
Phone: 972.233.9107, Ext. 204
E-mail: info@isbworldoffice.com
http://www.isbworldoffice.com/index.html