1 September 1980 - 1 January 1983
| DOI | https://doi.org/10.48597/6BPZ-EB4W |
|---|---|
| Start time | 1 September 1980 |
| Stop time | 1 January 1983 |
| DOI | https://doi.org/10.48597/2BCT-SA9A |
|---|---|
| Start time | 1 September 1980 |
| Stop time | 1 January 1983 |
| DOI | https://doi.org/10.48597/59YR-3PE8 |
|---|---|
| Start time | 1 September 1980 |
| Stop time | 1 January 1983 |