Use directories to find associations, nonprofit organizations, government agencies, research centers and more related to your topic. Many of these groups will publish research in print and online that can be helpful for your research.
The following are selected guides and handbooks related to Disability Studies. To find additional references, search the Libraries' Catalog for keywords related to your subject area and the words "guides," "handbooks," or "manuals."
EDM: The Educator's Diagnostic Manual of Disabilities and Disorders by 
Handbook of Disability Studies by 
Learning Disabilities Sourcebook: Basic Consumer Health Information about Learning Disabilities..., 3rd ed. by 
Praeger Handbook of Special Education [E-Book and print] by 
Rights of the Disabled by 