Piyawadee Sonthisombat. (1999) Click evoked otoacoustic emissions and distortion product in normal hearing and hearing impaired adults. Mahidol University,:ม.ป.ท.Piyawadee Sonthisombat. 1999. Click evoked otoacoustic emissions and distortion product in normal hearing and hearing impaired adults. ม.ป.ท.:Mahidol University,;Piyawadee Sonthisombat. Click evoked otoacoustic emissions and distortion product in normal hearing and hearing impaired adults. ม.ป.ท.:Mahidol University, 1999. Print.