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    Slide of RCAHMW colour oblique aerial photograph of Diffwys Slate Quarry, Blaenau Ffestiniog, taken by C.R. Musson, 26/2/1991.Download and purchase options
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    NPRNTitleType Of SiteArchivesImagesNPRN85487TitleDiffwys Casson Slate QuarryType Of SiteQUARRYArchives53Images33