Cineradiographic data on the feature 'covered' in Twi vowel harmony.
D002933:Cineradiography; D005858:Germany; D008037:Linguistics; D010159:Palate / Q000000981:diagnostic imaging*; D010614:Pharynx / Q000000981:diagnostic imaging; D010700:Phonetics; D014059:Tongue / Q000000981:diagnostic imaging*; D014481:United States