Dangos 1 - 1 canlyniadau o 1 ar gyfer chwilio 'Miller, Silver', amser ymholiad: 0.01e Mireinio'r Canlyniadau
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    Technological change, employment and training in United States' metal mining. gan Miller, Silver

    Cyhoeddwyd 1989
    Llyfr

    Technological change, employment and training in United States' metal mining.

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