Report on the geology of the County of Londonderry and of parts of Tyrone and Fermanagh :
examined and described under the authority of the Master General and Board of Ordnance /
by J.E. Portlock.
|Main Creator:||Portlock, Joseph Ellison, 1794-1864.|
|Published / Created:||
Dublin : H.M.S.O., 1843.
This is the first report of the Geological Department of the Ordnance Survey of Ireland.
Physical description: xxxii, 784 p. : ill., fold. map ; 8vo