An Economic History of the Illinois and Michigan Canal: I J. W. Putnam Journal of Political Economy 1909 17(5), 272-295 open access
An Economic History of the Illinois and Michigan Canal: II J. W. Putnam Journal of Political Economy 1909 17(6), 337-353
An Economic History of the Illinois and Michigan Canal: III J. W. Putnam Journal of Political Economy 1909 17(7), 413-433