Economic aspects of the Great Lakes-St. Lawrence ship channel This book, "Economic aspects of the Great Lakes-St. Lawrence ship channel", by Roy S. MacElwee, is a replication of a book originally published before 1921. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.