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WorldCat UMD has been optimized for discovery. This means that even if you are not an expert you are likely to come across something useful for your research. Even if you are an expert, you may come across new resources that you wouldn't have found otherwise.
Here are some examples of what you can find in WorldCat UMD:
What resources are not included in WorldCat UMD?
Some of the 300+ databases in Database Finder are ONLY available through Database Finder directly.