File:Geology Lincolnshire NEIMME 1875.jpg
from
- Daglish, J.; Howse, R. (1875), “Some Remarks on the Beds of Ironstone Occurring in Lincolnshire”, in Transactions of the North of England Institute of Mining Engineers, volume 24 (1874-75), pages 23 -
- Daglish, J.; Howse, R. (1875), “Some Remarks on the Beds of Ironstone Occurring in Lincolnshire”, in Transactions of the North of England Institute of Mining Engineers, volume 24 (1874-75), pages 32 -