Transactions of the Royal Geological Society of Cornwall, Vol.6 p150 - 172
| Observations on the Mining Laws of Germany & some other Countries, (Prussia, Saxony, Russia, Sweden, Norway) Sir C Lemon, VI: 150-172. |
| Observations on the Mining Laws of Germany & some other Countries, (Prussia, Saxony, Russia, Sweden, Norway) Sir C Lemon, VI: 150-172. |