TY - BOOK AU - Heman-Ackah, Yolanda TI - Voice professional : an issue of otolaryngologic clinics SN - 9781416051060 U1 - 617.51 HEM PY - 2007/// CY - Philadelphia, PA PB - Elsevier Saunders KW - Voice culture KW - Voice disorders -- Treatment N1 - Includes index ER -