Archif6438654TeitlDMHC04_101 - Dr Michael Harrison CollectionLefelSub-groupDisgrifiadColour slides showing sites and buildings in Dr Harrison's classification "Lead - 10290".Cyfrwng20 slides. Photo.Delweddaun
Archif6421960TeitlWMPT116 - Welsh Mines Preservation TrustLefelBatchDisgrifiadDigital photos of Level fawr Mine, with cover sheet..Cyfrwng136 photos. Text, Photo.Delweddaun
