The MERLIN catalog lists a wealth of language learning materials. A general subject search for "Chinese Language" will retrieve hundreds of books. To see what is available in electronic format, click on Limit, and choose Ebook as the Material Type.
Add the following sub-headings after Chinese Language to get more specific results:
The following databases list research on linguistics and language pedagogy. See also the MERLIN catalog, using the broad subject heading "German Language", or the more specific "German Language Study and Teaching".
Indexes journals, books, dissertations and other media covering all aspects of linguistics, speech, language and hearing pathology.
Provides access to the educational and related literature available in periodicals published worldwide and in the ERIC documents microfiche collection.
Includes full-text education journals that cover the essentials of education and related fields of study, including in-depth coverage of special education.