TY  - BOOK
AU  - Blethyn,Stan G.
AU  - Parker,Carys Y.
TI  - Design information systems
SN  - 0750610387
U1  - T/58.6 
PY  - 1990///
CY  - London
PB  - Butterworth-Heinemann
KW  - Management information systems.
ER  -