1 September 1980 - 1 January 1982
| DOI | https://doi.org/10.48597/KB6S-U8Z6 |
|---|---|
| Start time | 1 September 1980 |
| Stop time | 1 January 1982 |
| DOI | https://doi.org/10.48597/86P7-73GF |
|---|---|
| Start time | 1 September 1980 |
| Stop time | 1 January 1982 |
| DOI | https://doi.org/10.48597/9PRS-CKKN |
|---|---|
| Start time | 1 September 1980 |
| Stop time | 1 January 1982 |