1.
Qu'est-ce que l'UIT? / Union Internationale des Télécommunications
Data Publicação:
1974
2.
Supplement to the compendium of the technical recommendations : issued by CCIF, CCIT, CCIR of the International Telecommunications Union / Automatic Telephone & Electric Co Ltd
Data Publicação:
1957
3.
Compendium of the technical recommendations : issued by CCIF, CCIT, CCIR of the International Telecommunications Union / Automatic Telephone & Electric Co Ltd
Data Publicação:
1955