Traphont ddŵr Pontcysyllte, Wrecsam: 200 : 1805-2005 : dathliadau deucanmlwyddiant campwaith peirianneg = Pontcysyllte aqueduct, Wrexham : 200 : 1805-2005 : bi-centenary celebrations of engineering ex. Published by Dyfrffyrdd Prydain in 2005. Publication and catalogue information, links to buy online and reader comments.