UnCover (CARL) Has now merged with Ingenta, "gateway to research". Search for free,
but you have to set up an account and pay in order to look at an article
WorldCat "With WorldCat, you can use the Internet to locate books and magazines.
It searches library catalogs for what you need. Then type in your ZIP code to find local libraries that carry the title." This site describes
how it works. Site suggested by Lou Gable.