An investigation of the engineering and economic phases of the reduction of a specific ruling grade on the Illinois Central Railroad - By the method of "reduction by diversion"
Tu, Tinph Weitsen; Wright, Thomas Judson
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https://hdl.handle.net/2142/106108
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An investigation of the engineering and economic phases of the reduction of a specific ruling grade on the Illinois Central Railroad - By the method of "reduction by diversion"
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