Psicologia / prop. Associação Portuguesa de Psicologia
EN 14534 [documento electrónico] : postal services: quality of service: measurement of the transit time of end-to-end services for bulk mail / European Committee for Standardization
Postal services [documento electrónico] : forms: harmonised vocabulary: ENV 13712: April 2000 / European Committee for Standardization
Postal services [documento electrónico] : apertures of private letter boxes and letter plates: requirements and test methods: EN 13724: November 2002 / European Committee for Standardization