TY  - BOOK
AU  - O'Brien,James A.
TI  - Management information systems: a managerial end user perspective 
SN  - 0256103461 (hbk.)
PY  - 1993///
CY  - Homewood, Ill.
PB  - Irwin
KW  - Management information systems
N1  - Includes index; Includes bibliographical references
ER  -