Frontmatter -- Contents -- Preface -- Acknowledgements -- Conventions on Transcriptions -- Chapter 1. Language Universals and Crosslinguistic Studies of Phonological Acquisition -- Chapter 2. Putonghua Phonology -- Chapter 3. Phonological Acquisition of Normally Developing Children. I: Cross-sectional Study -- Chapter 4. Phonological Acquisition of Normally Developing Children. II: Longitudinal Study -- Chapter 5. The Phonological Systems of Putonghua-speaking Children with Functional Speech Disorders -- Chapter 6. Development and Change in the Phonology of Putonghua-speaking Children with Functional Speech Disorders -- Chapter 7. The Phonological Systems of a set of Putonghua-speaking Twins -- Chapter 8. Phonological Development of a Putonghua-speaking Child with Prelingual Hearing Impairment: A Longitudinal Case Study -- Chapter 9. General Discussion and Conclusion -- References -- Appendices -- Index