1 January 1980 - 1 January 1981
| DOI | https://doi.org/10.48597/SDXA-2G94 |
|---|---|
| Start time | 1 January 1980 |
| Stop time | 1 January 1981 |
| Valid since | 10 December 2018 13:30:00 |
| DOI | https://doi.org/10.48597/SDXA-2G94 |
|---|---|
| Start time | 1 January 1980 |
| Stop time | 1 January 1981 |
| Valid since | 10 December 2018 13:30:00 |
| DOI | https://doi.org/10.48597/8DQE-KU9B |
|---|---|
| Start time | 1 January 1980 |
| Stop time | 1 January 1981 |
| Valid from | 1 May 2014 00:00:00 |
| Valid to | 10 December 2018 13:30:00 |