TY  - BOOK
AU  - Bleumer,Gerrit
TI  - Electronic postage systems: technology, security, economics 
SN  - 0387293132
PY  - 2007///
CY  - Birkenwerder, Germany
PB  - Springer
KW  - Postal service
KW  - Technological innovations
KW  - Data processing
KW  - Computer security
ER  -