TY  - BOOK
AU  - Head, Robert V
TI  - Guide to packaged systems 
T2  - The wiley communigraph series on business data processing 
SN  - 0-471-36600-5
PY  - 1971///
CY  - New York: 
PB  - Wiley-Interscience 
KW  - Packaged systems
KW  - Business data processing
KW  - Management applications
ER  -