Transactions of the Royal Geological Society of Cornwall, Vol 1, p71 - 77
Transactions of the Royal Geological Society of Cornwall, Vol 1, p71 - 77
| A sketch of the Plan of the Mining Academies of Freyberg & Schemnitz, J H Vivian |
| A sketch of the Plan of the Mining Academies of Freyberg & Schemnitz, J H Vivian |