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Organisation:The National Bureau of Economic Research
Website:https://www.nber.org
Publication:Transportation and Public Utilities
Series:m03009a
Download Page:http://www.nber.org/databases/macrohistory/contents/chapter03.html
Download Url:http://www.nber.org/databases/macrohistory/data/03/m03009a.db
Period:1915 - 1917
Date Accessed: Tuesday, December 31, 2019