搜索结果: 1-1 共查到“法学 railroad transportation”相关记录1条 . 查询时间(0.053 秒)
Multifactor productivity in railroad transportation
Multifactor productivity railroad transportation
2009/5/8
Multifactor productivity growth in this industry averaged 3.5 percent per year between 1958 and 1989. Consolidation of railroads into larger systems, particularly in the 1980's, generated operational ...