Plant yn y pyllau glo, 1840-42 /
Evans, Richard Meurig.
Rogers, William Morgan.
National Museum of Wales.Schools Service.
[Caerdydd] : Amgueddfa Genedlaethol Cymru, Gwasanaeth i'r Ysgolion,
1979.
Translation of: 'Children in the mines, 1840-42'. 1972.
Bibliography: p. 37.
Children
Coal miners