As you search for sources in databases, the library catalog, and search engines, you will probably locate many more results than you can read or use.
You should scan through the search results for the most promising sources. Then preview them—without actually reading them—to see whether they are likely to live up to your expectations and meet your needs.
In the list of search results, watch for clues indicating whether a source might be useful:
Selecting articles in databases
Selecting books
Selecting web sources
Selecting versions of electronic sources