Ordnance Survey letters Offaly : letters containing information relative to the antiquities of the King's County, collected during the progress of the Ordnance Survey in 1837-38 /
O'Donovan, John,1809-1861.
O'Conor, Thomas.
O'Keeffe, P.(Patrick)
Herity, Michael.
Dublin : Four Masters Press,
2008.
Includes bibliographical references and index.
Ordnance Survey of Ireland