TY - BOOK AU - O'Sullivan,Arthur AU - Sheffrin,Steven M. TI - Economics: principles and tools SN - 0131479717 AV - HB171.5.O8 2006 PY - 2006/// CY - Upper Saddle River, NJ PB - Pearson/ Prentice Hall KW - Economics N1 - Includes bibliographical references and index ER -