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Useful Reference Links: Reference Sources
Check out some of these open access resources recommended by librarians.
A public service organization hosted by Drexel University and a consortium of universities providing information categorized by subject, newspapers & magazines, special collections and sites for kids and teens.
This search engine is valuable for numeric data. Need an equation to find the energy of a system? Type in "energy equation" and you will get it. Want to know distance and info related to Kokomo and Paris? Type in the two city names and find it.
This site not only gives you the definitions of words, but also gives the pronunciation and usage in a sentence. While other dictionaries provide some of this information, this one is very user friendly, with a clean interface.