TY  - BOOK
AU  - Whitten L. Jeffrey.
TI  - Systems analysis & design methods
SN  - 0256074933
AV  - QA76.9.S88W48 1989 
PY  - 1989///
CY  - Boston
PB  - Irwin
KW  - Systems
N1  - Includes bibliographies and index
ER  -