【作者(必填)】Michael Kuby and Neil Reid

【文题(必填)】Technological Change and the Concentration of the U.S. General Cargo Port System: 1970-88

【年份(必填)】1992

【全文链接或数据库名称(选填)】http://www.jstor.org/discover/10.2307/144186?uid=3737800&uid=2129&uid=2&uid=70&uid=4&sid=21102598316863