原文传递 A study of the cost-effectiveness of grading unpaved roads in developing countries
题名: A study of the cost-effectiveness of grading unpaved roads in developing countries
责任者: Jones, TE,Robinson, R
学科分类: 暂无分类
出版机构: Transport Research Laboratory
提交日期: Jan 1986
总页数: 11
报告类型: 科技报告
资源类型: 科技(咨询、行业)报告
初始创建时间: Jan 1986
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