If you can't find an encyclopedia, dictionary, article, etc. on your topic, try using some broader keywords. For example, if your topic is "global warming," consider searching for a book or encyclopedia about the environment.
If that doesn't work try asking a librarian or your professor for some keyword suggestions.
Once you have identified some keywords, the next step is to find background information on your topic. Background info serves many purposes including:
Wikipedia can be a great tool for beginning research. However, It must be taken with a grain of salt. In fact, Wikipedia itself even cautions you against using it as a source.
Wikipedia articles can be written and edited by anyone, including you! Likewise, articles are never "finished" -- instead they are works in progress. Therefore, Wikipedia is best used as starting point only.
Better yet, there are a wide variety of very reliable sources out there for you. Just ask a librarian to help you find them!
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