| 1. | ISO 8258 [documento electrónico] : Shewhart control chartsData Publicação: 1991 Tema: Normas |  | |
| 2. | ISO 10173 : information technology: integrated services digital network (ISDN) primary access connector at reference points S and T / Organisation Internationale de NormalisationData Publicação: 1991 Tema: Normas | | |
| 3. | ISO GUIDE 2 : general terms and their definitions concerning standardization and related activitiesData Publicação: 1991 Tema: Normas | | |