Imiwneiddio plant o oedran ysgol uwchradd.
Wales.Welsh Assembly Government.
Health Challenge Wales (Initiative)
NHS Wales.
[Caerdydd] : Llywodraeth Cymru,
c2011.
Teitl clawr = Cover title.
"Her Iechyd Cymru, GIG Cymru = Health Challenge Wales, NHS Wales" - ar y clawr = on cover.
"WAG11-11560."
Immunization
Vaccination