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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6419423
    Disgrifiad
    Correspondence and reports from the National Coal Board on coal found at Blaenllynfi
    Enw Casgliad
    EXC - Excavations Collection
    Cyfrwng
    Text, Photo, Graphic.
    Cychwynnwr
    RCAHMW