Report on the geology of the county of Londonderry, and of parts of Tyrone and Fermanagh.
By: Examined and described under the authority of the Master General and Board of Ordnance, by J.E. Portlock ...
Contributors: Portlock, Joseph Ellison, 1794-1864
Publisher: H.M.S.O.
Published: 1843
Place of publication: Dublin
Language: eng
Number of pages: 784
Subjects: Ireland -- Geology; Londonderry
Notes: "Printed for Her Majesty's Stationery Office".

Pubd by Milliken, Hodges and Smith, and Longman Brown, Green, and Longmans.