Memoirs of the Geological Survey. Vol. XX: Lead and zinc. The mining district of North Cardiganshire and West Montgomeryshire

Geological Survey, Jones, O. T., M.A., D.Sc, 1922

Main title:: Memoirs of the Geological Survey. Vol. XX: Lead and zinc. The mining district of North Cardiganshire and West Montgomeryshire
Author/s:: Geological Survey, Jones, O. T., M.A., D.Sc
Blwyddyn Cyhoeddi:: 1922

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Main title:: Memoirs of the Geological Survey. Vol. XX: Lead and zinc. The mining district of North Cardiganshire and West Montgomeryshire
Author/s:: Geological Survey, Jones, O. T., M.A., D.Sc
Blwyddyn Cyhoeddi:: 1922