1. | A study into factors influencing postal services and methods for forecasting traffic / European Conference of Postal and Telecommunications AdministrationsData Publicação: [1989] Tema: Comunicações Eletrónicas | ||
2. | Minutes of the fourth meeting of subgroup RR3 / European Conference of Postal and Telecommunications AdministrationsData Publicação: 1989 Tema: Vária | ||
3. | Meeting in Copenhagen, 30 May - 1 June 1989 : draft agenda / European Conference of Postal and Telecommunications AdministrationsData Publicação: 1989 Tema: Vária |