Transactions of the Royal Geological Society of Cornwall, Vol.4 p145 - 165
| On the Manipulations to which the Ores of Tin & Copper are subjected in the central Mining District of Cornwall, W J Henwood [Read October, 1828], IV: 145-165. |
| On the Manipulations to which the Ores of Tin & Copper are subjected in the central Mining District of Cornwall, W J Henwood [Read October, 1828], IV: 145-165. |