Survey of public views on the coronavirus (COVID-19), adults aged 16 to 74, 19 March 2020 to 11 October 2021, file type: ODS, file size: 8 KB
Arolwg o farn y cyhoedd ar y conorafeirws (COVID-19), oedolion 16 i 74 oed, 19 Mawrth 2020 i 11 Hydref 2021, Saesneg yn unig, math o ffeil: ODS, maint ffeil: 8 KB