These materials are trickier – search tools are under development. The major collections are accessible through Internet search engines and directories (e.g., Yahoo's Subject Directory, under "Digital Libraries > Projects and Collections" ), and some through the library catalog and WorldCat.

There are other search tools:

• OAIster (accessible from the library's Databases page) is a specialized database that:

• contains digital resources from open archive collections
• represents multidisciplinary resources from more than 1000 contributors worldwide.
• contain a digital object link allowing users access to the object in a single click.

• AcademicInfo: "Digital Libraries - Online Publications, Exhibits, Documents & Journals" : Extensive and growing subject listing of digital collections and exhibits.

• Library and Archival Exhibitions on the Web "This site features links to online exhibitions that have been created by libraries, archives, and historical societies, as well as to museum online exhibitions with a significant focus on library and archival materials."

• Many of the "Subject Guides" on the Library's Web site will link to various Web Resources that contain digital collections.