If you come across an article that the Duke University Libraries do not have full text access to you can make a request via Interlibrary Loan. Articles generally take 2 to 3 business days to arrive. You'll receive an email when the PDF has arrived.
Use the search portal on the Duke Libraries' homepage to find:
Can't find the article? Request articles that Duke doesn't own Interlibrary Requests.
Although most research in disability studies employs the social model of disability, you may want to find medical articles on disability as well. I'd recommend using the following databases: