Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Garnddyrys (report)
63 page booklet with 2 plans, and illustration 'Water Outlet from Top Pond' by M. Blackmore, 1972 (copied from original report).
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.