Quantitative Economic History of Coal Mining in the Ruhr Area in the 19th Cen...
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Firstly Holtfrerich presents the Rostov Concept of the leading sector, before he sketches the development of mining in the Ruhr area by means of theoretical approaches...
首先，霍尔特弗赖里奇（Holtfrerich）阐释了主导部门的罗斯托夫概念（Rostov Concept），随后他借助理论方法勾勒了鲁尔区（Ruhr Area）的矿业发展脉络……
