org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse English Geological map of the County of Londonderry, and of Parts of Tyrone and Fermanagh...
DescriptionPortlock 1843 Plate H Drumglass Coal Field.jpg English: Map of the Drumglass Coal Field. From: Report on the Geology of the County of Londonderry, and...
from Portlock 1843 Plate H Drumglass Coal Field.jpg English: Map of the Drumglass Coal Field. From: Report on the Geology of the County of Londonderry, and...
