TY  - BOOK
AU  -  Whitten, jeffrey l. 
TI  -  Systems analysis and design methods / Jeffrey L.Whitten, Lonnie D. Bentley, Victor M. Barlow. 
SN  - 0256108315 (international ed.)
U1  - 005.1 WHI 
KW  -   System design.   2.system analysis.
ER  -