The database recognizes the following three Boolean operators: AND, NOT, OR.
Slovak NOT Czech (Results will include only records identified as a Slovak and are not simultaneously identified as Czech).
Czech OR Slovak NOT Slovenian (Results will incude all records identified as Czech, all records identified as Slovak and no records identified as Slovenian)
The additional search options provide the user with a more directed search. These search qualifiers include Subject, Medium, and Date. The predefined subject list can aid in general searches. Medium searches allows users to narrow materials by their genre. Searches can also be qualified by date, by entering the earliest and latest years for which you wish to discover materials, or by selecting particular decades from the choices shown. As always, users may select more than one option in a list by holding down the "Ctrl" (Windows) or the "Apple" (Macintosh) key and clicking each item individually.