TY  - GEN
AU  - Edwards, Chris.
AU  - Ward, John; Bytheway, Andy
TI  - (The) essence of information systems
AV  - HF5548.2 Edw.
PY  - 1991///
PB  - Prentice Hall
KW  - Business - Data processing
KW  - Business - Communication systems
KW  - Management information systems
N1  - 6448
ER  -