Context

Context of Sewage pollution of interstate and international waters with special reference to the spread of typhoid fever. II. Lake Superior and St. Marys River, III. Lake Michigan and the Straits of Mackinac, IV. Lake Huron, St. Clair River, Lake St. Clair, and the Detroit River, V. Lake Ontario and St. Lawrence River, by Allan J. McLaughlin [U.S. Hygienic Laboratory Bulletin 83. March 1912.].
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