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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6482673
    Disgrifiad
    Black and white photo survey showing Coed Helen Tunnel, taken by Iain Wright, 26th February 1992.
    Enw Casgliad
    NMR Site Files
    Cyfrwng
    7 photos. Photo.
    Cychwynnwr
    Iain N. Wright, RCAHMW
    Dyddiad
    1992-02-26