1 July 1972 - 1 April 1975
| DOI | https://doi.org/10.48597/4SEF-XEWW |
|---|---|
| Start time | 1 July 1972 |
| Stop time | 1 April 1975 |
| DOI | https://doi.org/10.48597/RUFG-Z5MS |
|---|---|
| Start time | 1 July 1972 |
| Stop time | 1 April 1975 |
| DOI | https://doi.org/10.48597/6SAH-2AMF |
|---|---|
| Start time | 1 July 1972 |
| Stop time | 1 April 1975 |