Absenteeism by mainstream secondary school and secondary aged pupils in middle schools, September 2017 to August 2018, file type: ODS, file size: 41 KB
Disgyblion a gyrhaeddodd drothwy lefel 3 a Bagloriaeth Cymru uwch, Medi 2015 i Awst 2018: diwygiedig, Saesneg yn unig, math o ffeil: ODS, maint ffeil: 41 KB