When you find one book in the library catalog that looks useful, review the subject terms that are listed in the book's record. Click on the link for any subject term that looks relevant to view other books in the library also on that subject.
Some useful keywords to use for searching are:
articulation disorders otolaryngology
audiology phonological disorders
communication disorders speech disorders
deafness speech language pathology
deglutition disorders speech pathology
hearing disorders speech therapy
language disorders voice disorders
These are a few of the many e-books available through the Library Catalog. To search for e-books, do an "Advanced Search" and limit your search to ebooks/ejournals.