http://www.asha.org/default.htm  The American Speech-Language-Hearing Association is the professional, scientific, and credentialing association for more than 127,000 members and affiliates who are speech-language pathologists, audiologists, and speech, language, and hearing scientists in the United States and internationally.

http://www.txsha.org/  Texas Speech Language and Hearing Association.
In the state of Texas, there are approximately 8,000 speech-language pathologists and audiologists. The mission of our association is to empower speech-language pathologists and audiologists in the spirit of partnership with consumers and families.

http://www.dshs.state.tx.us/speech/default.shtm  All speech language pathologists and audiologists must be licensed by the State of Texas through the Dept of Health Services.