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....

von Portlock, J. E.
Veröffentlicht 1843

Memoir of the life of Major-General Colby, together with a sketch of the origin und progress of the ordonance survey of Great Britain and Ireland; a work with which General Colby w...

von Portlock, J. E.
Veröffentlicht 1869