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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    6022627
    Disgrifiad
    Draft report entitled "Pontneddfechan Gunpowder Works & Silica Mines Management Plan Annex 12" by Brecon Beacons National Park dated 6th April 1990.
    Enw Casgliad
    Additional Information
    Cyfrwng
    Text, Cartographic.
    Cychwynnwr
    Brecon Beacons National Park
    Dyddiad
    1990-04-06