Portlock, J. E. (1843). Report on the Geology of the county of Londonderry and a part of Tyrone and Fermanagh. Examined and described under the authority of the Master General and Board of Ordnance. Dublin (Milliken). pp. 1-784, Pls I - XXXVIII; A-I.
402548
Portlock, J. E.
1843
Report on the Geology of the county of Londonderry and a part of Tyrone and Fermanagh. Examined and described under the authority of the Master General and Board of Ordnance. Dublin (Milliken). pp. 1-784, Pls I - XXXVIII; A-I.