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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6374139
    Disgrifiad
    Photo survey of Onllwyn Coal Washery, produced by Iain Wright, January 1993.
    Enw Casgliad
    NMR Site Files
    Cyfrwng
    black and white photographs. Photo.
    Cychwynnwr
    Iain N. Wright, RCAHMW
    Dyddiad
    1993-01