1. American Speech-Language-Hearing Association. (2004a). Knowledge and skills for speech-language pathologists with respect to vocal tract visualization and imaging [Knowledge and skills]
. https://www.asha.org/policy/ks2004-00071/
2. American Speech-Language-Hearing Association. (2004b). Vocal tract visualization and imaging: Position statement [Position statement]
. https://www.asha.org/policy/ps2004-00121/
3. American Speech-Language-Hearing Association. (2004c). Vocal tract visualization and imaging: Technical report [Technical report]
. https://www.asha.org/policy/tr2004-00156/
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