If you have been timed out you will be asked to login again when you try to use the service. Search by entering a single search word or phrase at the enter keyword or phrase line and click on the perform search button. Select continue from the top of the screen to move on to the next screen. The advantage of the map term to subject heading option is that all synonyms are retrieved and topics can be defined more precisely. Select continue from the top of the screen to move on to the next screen.
Check explode to search groups of related headings together.
Use focus to restrict a search to only those articles where the search topic is the main focus. If you do not expect to retrieve many articles do not restrict. Click continue and the next screen displays a range of available subheadings . Choosing include all subheadings will retrieve all references about a topic, alternatively select specific subheadings to narrow a search to that particular aspect. For more information about any subheading click to obtain a full definition.