Characteristics and economic effects of industrial structure transformation and upgrade in energy exploitation area of northern Shaanxi province(陕北能源开发区产业转型升级特征及其经济效应)... par SONGYongyong(宋永永), XUEDongqian(薛东前), DAILanhai(代兰海), ZHONGJuntao(仲俊涛), XIASiyou(夏四友)

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