Mineral Planning Guidance 12: Treatment of Disused Mine Openings and Availability of Information on Mined Ground, file type: PDF, file size: 2 MB
Canllawiau Cynllunio Mwynau 12: Trin Agoriadau Mwyngloddiau Segur ac Argaeledd Gwybodaeth am Dir, Saesneg yn unig, math o ffeil: PDF, maint ffeil: 2 MB