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5主題 “...Gold mines and mining....”
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6出版 1977主題 “...Gold mines and mining California Sources....”
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7
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8出版 1974主題 “...Gold mines and mining Australia History...”
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10出版 1979主題 “...Gold mines and mining Illustrations....”
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16出版 1970主題 “...Gold mines and mining California....”
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17
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18主題 “...Gold mines and mining History....”
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