Reference books in the Research Services Area (1st Floor) and books in the Main Collection (2nd and 3rd Floors) are arranged according to the Library of Congress Classification System.
Call numbers are arranged in alphabetical and then numerical order, with the call number referring to the subject the book is about.
Books with a call number beginning with "HA-HJ" deal with Business. Subclass HF deals with commerce. HF5410-HF5417.5 are books that deal strongly with the subject heading "Marketing. Distribution of Products."
If you are searching the Research Services Area for reference materials, try searching HA-HJ first.
To locate materials quickly, it is highly recommended you utilize the Library Catalog. See "Using the Library Catalog" in the Library Orientation Guide for tips on searching for materials using the catalog.