How to Search PERIND: Boolean Operators Boolean operators can be used to combine multiple search terms. These terms can be used in the same field or in different fields. Three boolean operators can be used: AND retrieves records that include all the search terms entered. It is used to narrow search results. e.g. Asian values AND Singapore   OR retrieves records that include one or all search terms. It maximises the number of records retrieved as it expands the number of terms in the search. e.g. Aged OR senior citizens.   NOT retrieves records that include the first term but not the second term. It may eliminate unwanted documents but it may also eliminate relevant records. e.g. Family NOT women. About PERIND | Search | Search Fields | Display Search Results | View Full Citation | Full-text of Article | Refine Search Results | Mark Search Results Save/Print Search Results | Browse Index | Boolean Operators | Truncation Combine Search Sets |  Broad Classification | Logout Database Guides   Top   Digital Library   Content by Last updated 11-11-2008