Transactions of the Royal Geological Society of Cornwall, Vol.3 p256 - 312
| On the Produce of the Copper Mines of Europe & Asia & particularly those of Armenia, J Hawkins, [Read September, 1827], III: 256-312, 1828. |
| On the Produce of the Copper Mines of Europe & Asia & particularly those of Armenia, J Hawkins, [Read September, 1827], III: 256-312, 1828. |