http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Statistics of railroads of class I in the United States
Association of American Railroads, Economics and Finance Dept.
"This bulletin is based upon official summaries of the Interstate Commerce Commission."
Continues: Statistics of railroads of class I, United States, issued by the Bureau of Railway Economics, Washington, D.C.
Merged with: Economic ABZ's of the railroad industry, to form: Railroad ten-year trends.
Statistics of railroads of class I, in the United States
Association of American Railroads. Bureau of Railway Economics.