Descriptors offer quicker, more accurate searches.
There is a Thesaurus for each database, available either online or in book format. This will give you suggestions for other descriptors from the Thesaurus that you might use. As you are look through the list of citations, you can MARK some of the records for printing or downloading. To do this simply click the book icon on the top left side of the citation. A line will appear in the left margin of the record you marked.