Rhif ArchifTeitlLefelDisgrifiadCyfrwngDelweddauRhif Archif6147533Teitl925084_60 - RCAHMW Black and White Oblique Aerial PhotographsLefelItemDisgrifiadRCAHMW Black and white oblique aerial photograph of Bwlch-ystyllen Lead Mine, Blaenrheidol, taken on 30/10/1992 by CR MussonCyfrwngPhoto.DelweddaunRhif Archif6147534Teitl925084_61 - RCAHMW Black and White Oblique Aerial PhotographsLefelItemDisgrifiadRCAHMW Black and white oblique aerial photograph of Bwlch-ystyllen Lead Mine, Blaenrheidol, taken on 30/10/1992 by CR MussonCyfrwngPhoto.DelweddaunRhif Archif6147531Teitl92_CS_1499 - RCAHMW Colour Oblique Aerial PhotographsLefelItemDisgrifiadRCAHMW colour slide oblique aerial photograph of Bwlch-ystyllen Lead Mine, Blaenrheidol, taken on 30/10/1992 by CR MussonCyfrwngPhoto.DelweddaunRhif Archif6147532Teitl92_CS_1500 - RCAHMW Colour Oblique Aerial PhotographsLefelItemDisgrifiadRCAHMW colour slide oblique aerial photograph of Bwlch-ystyllen Lead Mine, Blaenrheidol, taken on 30/10/1992 by CR MussonCyfrwngPhoto.Delweddaun