1 September 1980 - 1 January 1983
| DOI | https://doi.org/10.48597/ZBRV-6ZEH |
|---|---|
| Start time | 1 September 1980 |
| Stop time | 1 January 1983 |
| DOI | https://doi.org/10.48597/EZ4G-D6ZF |
|---|---|
| Start time | 1 September 1980 |
| Stop time | 1 January 1983 |
| DOI | https://doi.org/10.48597/U2CH-K6J3 |
|---|---|
| Start time | 1 September 1980 |
| Stop time | 1 January 1983 |
| DOI | https://doi.org/10.48597/8H9T-E3YN |
|---|---|
| Start time | 1 September 1980 |
| Stop time | 1 January 1983 |