Gibbon, FionaBeck, Janet M.2018-06-292018-06-292002-01-06Gibbon, F.E. and Beck, J.M. (2002) ‘Therapy for abnormal vowels in children with phonological impairment’, in M.J. Ball and F.E. Gibbon (eds) Vowel disorders. Boston: Butterworth-Heinemann, pp. 217–248.978-0750672498https://eresearch.qmu.ac.uk/handle/20.500.12289/2264217-248258book_section