Texts from the pre-Islamic era to the cusp of the modern period, the collection encompasses a wide range of genres, including poetry, poetics, fiction, religion, philosophy, law, science, history, and historiography.
Go to the library website or the library catalog
Start with keywords related to your topic, e.g. pre-Islamic dialects. Review the list of results and note how to access the material of interest.
If you do not find what you want, try a new search using synonyms related to the keywords of your research. Also, talk to your professor or a librarian if you need help.
Here are some suggested search strings:
You can also browse library shelves PJ6001-PJ8517 for materials related to Arabic language
Arabic Sociolinguistics by 
The Foundations of Arabic Linguistics by 
Modern Arabic sociolinguistics : diglossia, variation, codeswitching, attitudes and identity by 
The Early Islamic Grammatical Tradition by 
The Legacy of the Kitab by