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WorldCat contains all the records cataloged by OCLC member libraries, making it the largest database of library holdings in the world. More than 290,000,000 bibliographic records, representing more than 2,000,000,000 holdings from over 72,000 libraries in 170 countries with materials in over 470 languages, make up the database. It includes not only books, but also software, manuscripts, films, slides, music scores, newspapers, journals, videorecordings, magazines, and more.
"The University of Tulsa is dedicated to offering you access to the widest possible range of resources. You are now able to search our collection and the collections of many other libraries worldwide using WorldCat, the world's largest network of library-based content and services." -- Open WorldCat website
"ProQuest Dissertations and Theses: Global (PQDTGlobal) is the world's most comprehensive collection of full-text dissertations and theses. As the official digital dissertations archive for the Library of Congress and as the database of record for graduate research, PQDTGlobal includes millions of searchable citations to dissertations and theses from 1861 to the present day together with over a million full-text dissertations that are available for download in PDF format. Over 2.1 million titles are available for purchase as printed copies. The database offers full text for most of the dissertations added since 1997 and strong retrospective full-text coverage for older graduate works. It also includes PQDT UK & Ireland content." -- ProQuest
Tulsa City-County Library System is the primary information and resource center for the Tulsa, Oklahoma, metropolitan area. More than 1.7 million volumes and numerous library services are available to the public. Services range from Internet access and on-line databases, to adult literacy tutoring and children's reading programs. The Central Library, four regional libraries, and 19 branch libraries in Tulsa County serve over 308,000 library cardholders who check out more than 3.7 million books and materials each year.