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Duration of sustained phonation in kindergarten children.
Harden JR, Looney NA. Harden JR, et al. Among authors: looney na. Int J Pediatr Otorhinolaryngol. 1984 Mar;7(1):11-9. doi: 10.1016/s0165-5876(84)80049-x. Int J Pediatr Otorhinolaryngol. 1984. PMID: 6724808