If you hover over the "LC Call Number Outlines" tab that you clicked to get here, you'll see additional tabs underneath for each subsection. See those additional tabs for more details on what is included within each major sections of the call numbers.
Call numbers beginning with N are located in the Crouch Fine Arts Library, 3rd floor of Moody Memorial Library.
Call numbers beginning with T are located on the 2nd floor of the Jones Library.