Post services have steadily evolved over centuries as the key means for long-distance communication between people. Every year European consumers hand over about 135 billion postal items to postal operators, who deliver them throughout the European Commun
Charlene Rohr,Urs Trinkner,Alison Lawrence,et al. Study on Appropriate Methodologies to Better Measure Consumer Preferences for Postal Services: Final Report. 2011-01-01.