The Great Lakes-St. Lawrence Route : a National Necessity, an International Project : A Deep Waterway to the Sea, Address by Hon. Irvine L. Lenroot, U.S. Senator from Wisconsin : Benefits of Water Transportation, Address by Mr. S.A. Thompson, Secretary, National Rivers and Harbors Congress, Washington : at the Annual Meeting of the Canadian Deep Waterways and Power Association, Toronto, December 16-17, 1920