You may prefer to print this tutorial so you can refer to a printed copy while you are working online, or you can open another session or page online. We suggest you print this tutorial now. It is about 9 pages long. You will need to search for articles that discuss all of the main concepts in this topic. To get the best results from a database search, you have to follow some rules.
Most computerised databases use Boolean logic .
This has to do with the way you enter your search. In Boolean logic, the words AND and OR have special meanings. You use the word AND to search for references containing all the search terms . OR if you want to search for references containing either one term or the other . The use of truncation and wildcards help simplify this process.