TY  - BOOK
AU  - O'Brien,James A.
TI  - Introduction to information systems 
SN  - 9780072977288
AV  - HF5548.2 .O23 1997
U1  - 658.4038 OBR 21
PY  - 2005///
CY  - Boston
PB  - Irwin
N1  - Includes bibliographical references and indexes
ER  -