Transactions of the Royal Geological Society of Cornwall, Vol 2, p225 - 231
| On the Phenomena of Intersected Lodes, & the legitimate Inferences which may be drawn from them, J Hawkins, [Read October, 1820]. II: 225-231, 1822. |
| On the Phenomena of Intersected Lodes, & the legitimate Inferences which may be drawn from them, J Hawkins, [Read October, 1820]. II: 225-231, 1822. |