TY  - BOOK
AU  - Ratzan,Lee
TI  - Understanding information systems: what they do and why we need them 
SN  - 9780838908686
AV  - Z665 .R366 2004
PY  - 2004///
CY  - Chicago
PB  - American Library Association
KW  - Information science
KW  - Information storage and retrieval systems
KW  - Computer science
KW  - Popular works
KW  - Mathematics
N1  - Includes bibliographical references (p. 237-245) and index
UR  - http://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=110062&site=ehost-live&scope=site
ER  -