Absenteeism by mainstream secondary school and secondary aged pupils in middle schools, September 2017 to August 2018, file type: ODS, file size: 41 KB
Absenoldeb yn ôl ysgol uwchradd prif ffrwd a disgyblion oed uwchradd mewn ysgolion canol, Medi 2017 to Awst 2018, Saesneg yn unig, math o ffeil: ODS, maint ffeil: 41 KB