TY  - BOOK
AU  - O'Brian, James A
TI  - Introduction to information systems
U1  - 004.6 O6I(12) 
PY  - 2013///
CY  - New Delhi
PB  - McGraw-Hill International
N1  - 2907 03/11/2017 HBD17/7078 07/11/2017 Main Budget
ER  -