Prize Treatise on the Mineral Basin of Glamorgan and the Adjoining District. (Gwent and Dyfed Roy. Eisteddfod) Booker, Thomas William Heftet / 2018 / Engelsk
Prize Treatise On the Mineral Basin of Glamorgan and the Adjoining District. (Gwent and Dyfed Roy. Eisteddfod) Booker, Thomas William Innbundet / 2025 / Engelsk
Prize Treatise On the Mineral Basin of Glamorgan and the Adjoining District. (Gwent and Dyfed Roy. Eisteddfod) Booker, Thomas William Heftet / 2025 / Engelsk
