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    Manylion
    Hierarchaeth
    Safleoedd Cysylltiedig
    Rhif Archif
    2022-06-30_3561
    Disgrifiad
    Paper entitled 'Some aspects of Colliery Lighting' by E N Lockyer. Includes type written pages, diagrams and captioned photographs.
    Enw Casgliad
    ENL - E N Lockyer Collection
    Cyfrwng
    1 file. Paper and photo.
    Cychwynnwr
    E N Lockyer
    Dyddiad
    1950-1955