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The Library of Congress Classification (LCC) was developed by the Library of Congress, and is used by most research and academic libraries. Call numbers can begin with one, two, or three letters that define a book’s subject. http://www.loc.gov/catdir/cpso/lcco/
Location of Lehman Library Collection
Upper Level: General Collection, Oversize Collections
Main Level: Reference Collections
Lower Level: Periodicals Collections, Government Documents Collection