TY - BOOK AU - Valacich, Joseph S. AU - George, Joey F. AU - Hoffer, Jeffrey A. TI - Essentials of systems analysis and design SN - 0130183733 U1 - 004.21 VAL PY - 2001/// CY - New Jersey PB - Prentice-Hall KW - Systems N1 - Includes bibliographical references and index ER -