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3. Botts, L.: 1981, ?The West May Reach for Great Lakes Water?, Great Lakes Communicator 11, 6?7.
4. Cain, L. P.: 1969, The Sanitary District of Chicago: A Case Study of Water Use and Conservation, Northwestern University, Evanston, IL, 591 pp.
5. Cain, L. P.: 1978, Sanitation Strategy for a Lakefront Metropolis, Northern Illinois University Press, DeKalb, 106 pp.