Yu, Ping [Voice disorders evaluation (II)]. [electronic resource] - Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery Oct 2007 - 797-800 p. digital Publication Type: Journal Article ISSN: 1673-0860 Subjects--Topical Terms: HumansVoice Disorders--diagnosisVoice Quality