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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6438592
    Disgrifiad
    Colour and b/w slides showing sites and buildings in Dr Harrison's classification "Coal - 10140".
    Enw Casgliad
    DMHC - Dr Michael Harrison Collection
    Cyfrwng
    17 slides. Photo.
    Cychwynnwr
    Dr Michael Harrison
    Dyddiad
    1910 to 1988