Gwelliant A494/550 Parc Glannau Dyfrdwy i Drome Corner.
Wales.Welsh Assembly Government.
North East Wales Trunk Road Agency.
Balfour Beatty & Co.
Gifford and Partners.
Caerdydd : Cynulliad Cenedlaethol Cymru,
[2004]
Bound back to back and inverted.
Cover title.
Includes bibliographical references.
Roads
Transportation, Automotive