Ehlers, V. M., & Steel, E. W. (1965). Municipal and rural sanitation (6th ed.). McGraw-Hill.
Chicago Style (17th ed.) CitationEhlers, Victor Marcus, and Ernest W. Steel. Municipal and Rural Sanitation. 6th ed. New York: McGraw-Hill, 1965.
MLA (8th ed.) CitationEhlers, Victor Marcus, and Ernest W. Steel. Municipal and Rural Sanitation. 6th ed. McGraw-Hill, 1965.
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