Subject searches on the online catalog should use a heading listed in Library of Congress List of Subject Headings (http://authorities.loc.gov/). Some geographical headings that may be useful in research are:
Great Lakes Region (North America)
Southern Atlantic States
Southern boundary of the
Keyword searches can be useful to find items that have no precise Library of Congress subject heading. For example, LC does not use "American studies". It puts works in this field under "United States--Civilization". Keyword searches retrieve large numbers of records, sometimes in the thousands. For this reason, it is important to narrow your search by limiting the type of materials you want to find, or combining terms to search for a more specific topic. Seek help from Library staff when you need it.