Type in the name of the town or county you are looking for sources about.

We are going to look for the sources of Warren County, Ohio. If I elect to only type in the name "Warren," I will receive a list of all the Warren localities in the catalog like this:

Arkansas, Bradley, Warren
Australia, Queensland, Warren
Connecticut, Litchfield, Warren
Georgia, Warren
Illinois, Jo Daviess, Warren
Illinois, Warren
Indiana, Huntington, Warren
Indiana, Warren
Iowa, Warren
Kentucky, Warren
Maine, Knox, Warren
Massachusetts, Worcester, Warren
Minnesota, Marshall, Warren
Mississippi, Warren
Missouri, Warren
New Hampshire, Grafton, Warren
New Jersey, Warren
New York, Herkimer, Warren
New York, Warren
North Carolina, Warren

Notice as well that it states the following at the bottom of this list of entries:

Numbers 1-20 of 31 matching places

This means there are still entries 21-31 on another page and you can either click on the [21-31] or the words [Next results] at the bottom of the page which would lead you to the entries below.

One of them is just what we were looking for "Warren County, Ohio."

Ohio, Trumbull, Warren
Ohio, Warren
Ontario, Sudbury District, Warren
Pennsylvania, Warren
Pennsylvania, Warren, Warren
Rhode Island, Bristol, Warren
Tennessee, Warren
Utah, Weber, Warren
Vermont, Washington, Warren
Virginia, Warren
Wales, Pembroke, Warren

Had I entered Warren in the first search option and Ohio in the second search option, only Warren County, Ohio would have appeard.