WorldCat [via OCLC]
OCLC catalog of millions of records for books, journal titles and materials in other formats from approximately 12,000 libraries worldwide.
Coverage
1000 A.D.-present
Materials
Articles (Journal)
Audio
Books/Text
Conference Papers/Proceedings
Data/Statistics
Dissertations/Theses
Images
Manuscripts/Archival Material
Maps/GIS
Musical Scores
Newspapers/News Sources
Reference
Technical Reports