DJVU PDF Thongkum, T.L. 1979, "Iconicity of vowel qualities in Northeastern Thai reduplicated words", in Studies in Tai and Mon-Khmer Phonetics and Phonology In Honour of Eugénie J.A. Henderson, ed. T.L. Thongkum et al., pp. 247-260. Chulalongkorn University Press. cite.