TY  - GEN
AU  - Grad,Burton
AU  - Grad,Burton
TI  - Management systems: the study and design of information system 
AV  - T58.6.G73.1979 
PY  - 1979///
CY  - Hillsdale, Illinois : 
PB  - Dryden Press, 
KW  - Information storage and retrieval
KW  - Management information systems
ER  -