2020DIN EN 14012:2020-06 Postal services - Quality of service - Complaints handling principles; German version EN 14012:2019
2020DIN EN 14012:2020 Postal services - Quality of service - Complaints handling principles
1970DIN EN 14012 E:2018-09 Postal services - Quality of service - Complaints handling principles
2018DIN EN 14012 E:2018 Draft Document - Postal services - Quality of service - Complaints handling principles; German and English version prEN 14012:2018
2009DIN EN 14012:2009 Postal services - Quality of service - Complaints handling principles; English version of DIN EN 14012:2009-04