TY  - BOOK
AU  - Ratzan Lee
TI  - Understanding information system :  What they do and why we need them
SN  - 818408238X (hbk)
U1  - 2:(D65,8(B)):8, P9(2D) 
PY  - 2009///
CY  - New Delhi
PB  - Indiana Publishing House India   
KW  - LIBRARY SCIENCE
ER  -