Mineral statistics 1894,
Ychwanegu i'r clipfwrdd
Mineral statistics 1894,
Mineral statistics 1902,
Ychwanegu i'r clipfwrdd
Mineral statistics 1902,
Mineral statistics 1903,
Ychwanegu i'r clipfwrdd
Mineral statistics 1903,
Mineral statistics 1912,
Ychwanegu i'r clipfwrdd
Mineral statistics 1912,
Mineral statistics 1916,
Ychwanegu i'r clipfwrdd
Mineral statistics 1916,
Statements from auditor's returns (3),
Ychwanegu i'r clipfwrdd
Statements from auditor's returns (3),
British and foreign trade,
Ychwanegu i'r clipfwrdd
British and foreign trade,
Compilation of statistics of the coal mining industry of the United Kingdom and the principal foreign countries of the world (2),
Ychwanegu i'r clipfwrdd
Compilation of statistics of the coal mining industry of the United Kingdom and the principal foreign countries of the world (2),
Coal exports from Bristol Channel ports (1),
Ychwanegu i'r clipfwrdd
Coal exports from Bristol Channel ports (1),
Shipments of coal, etc. from U.K. and South Wales ports,
Ychwanegu i'r clipfwrdd
Shipments of coal, etc. from U.K. and South Wales ports,
Monthly and quarterly quantities, values and average declared price of coal exported from English and Scottish ports,
Ychwanegu i'r clipfwrdd
Monthly and quarterly quantities, values and average declared price of coal exported from English and Scottish ports,
Monthly statistical review of the coal industry,
Ychwanegu i'r clipfwrdd
Monthly statistical review of the coal industry,
Monthly statistical review of the coal industry,
Ychwanegu i'r clipfwrdd
Monthly statistical review of the coal industry,
Monthly statistical review of the coal industry,
Ychwanegu i'r clipfwrdd
Monthly statistical review of the coal industry,
Monthly statistical review of the coal industry,
Ychwanegu i'r clipfwrdd
Monthly statistical review of the coal industry,
Firemen: associated collieries,
Ychwanegu i'r clipfwrdd
Firemen: associated collieries,
Underground daywagemen at associated anthracite collieries,
Ychwanegu i'r clipfwrdd
Underground daywagemen at associated anthracite collieries,
Tredegar Iron and Coal Company Ltd,
Ychwanegu i'r clipfwrdd
Tredegar Iron and Coal Company Ltd,
Rhymney Iron Company,
Ychwanegu i'r clipfwrdd
Rhymney Iron Company,
Acorn Colliery Company Ltd,
Ychwanegu i'r clipfwrdd
Acorn Colliery Company Ltd,
Canlyniadau 61 i 80 o 1510