TY - BOOK AU - Valacich, Joseph S., AU - George, Joey F. AU - Hoffer, Jeffrey A. TI - Essentials of systems analysis and design SN - 8120323122 AV - 004.21 VAL U1 - 004.21 PY - 2003/// CY - Upper Saddle River, N.J. PB - Prentice Hall KW - System design KW - System analysis N1 - Includes bibliographical references (p. 443-446) and index ER -