John Archibald 
Phonological Acquisition and Phonological Theory [PDF ebook] 

Much of the work currently conducted within the framework of Universal Grammar and language learnability focuses on the acquisition of syntax. However, the learnability issues are just as applicable to the domain of phonology. This volume is the first to gather research that assumes a sophisticated phonological framework and considers the implications of this framework for language acquisition — both first and second. As such, this book truly deals with phonological acquisition rather than phonetic acquisition.