books.google.co.uk - This book examines this development in the broader context of diglossia, and also of the patterns by which spoken vernaculars have developed written forms in other societies....http://books.google.co.uk/books/about/Cantonese_as_written_language.html?id=pFnP_FXf-lAC&utm_source=gb-gplus-shareCantonese as written language
