DIN EN 14508-2016 郵政服務.服務質量.單件無優先權郵件與二等郵件的點對點運送時間的測量.德文版本EN 14508-2016
Postal services - Quality of service - Measurement of the transit time of end-to-end services for single piece non-priority mail and second class mail; German version EN 14508:2016