OAIster - search the "deep web"

Google doesn't reach into all the resources available on the web. An especially rich vein is the large collection of digital resources in the Open Archives Initiative. OAIster is the union catalog of these resources, compiled by harvesting the descriptive records from the collections participating in this cooperative project - now numbering many hundreds. Nearly 11 million records are now in this catalog. The resources are of many types, including text, image, audio, video, and dataset.