books.google.fr - The Initial Consonant Mutation system of Welsh is unique to Indo-European languages. This comprehensive book provides an integrated overview of this important feature from a wide linguistic viewpoint....https://books.google.fr/books/about/Mutation_in_Welsh.html?hl=fr&id=yjgOAAAAQAAJ&utm_source=gb-gplus-shareMutation in Welsh
Martin J. Ball is Hawthorne/Board of Regents Endowed Professor and Head of the Department of Communicative Disorders at the University of Louisiana at Lafayette. He is President of the International Clinical Phonetics and Linguistics Association, and editor of the journal "Clinical Linguistics and Phonetics. "His publications include "Vowel Disorders" (co-edited with Fiona Gibbon, 2002) and "Methods in Clinical Phonetics "(with Orla Lowry, 2001).