Try searching in library databases for information on parents and teachers of blind and deaf children. These databases are likely to help you find sources relevant to you. Many are education databases, as they are going to help you find information on children. As a starting point, try some of the search strings at the bottom of this page in these various databases.
To get you started, here are some suggested search strings to input in these library databases. To understand how these search strings are constructed visit the "Searching in Databases" page