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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6072161
    Disgrifiad
    Blaenycwm Slate Quarry, Bro Machno; set of measured drawings produced by G.R. Jones, July 1991.
    Enw Casgliad
    OAI - Outsize Additional Information
    Cyfrwng
    Graphic.
    Cychwynnwr
    G.R. Jones
    Dyddiad
    1991-07