Test, Trace, Protect (contact tracing for coronavirus (COVID-19)): up to 31 July 2021, file type: ODS, file size: 34 KB
Profi, Olrhain, Diogelu (olrhain cysylltiadau ar gyfer coronafeirws (COVID-19)): hyd at 31 Gorffennaf 2021, math o ffeil: ODS, maint ffeil: 34 KB