Books by Robert Webster Kehr:
Books in the extended shelves:
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Kehr, Robert Webster, 1902-: A study of the pollution and natural purification of the Scioto river (U.S. Govt. print. off., 1941), also by United States Public Health Service and National Institute of Health (U.S.). Division of Public Health Methods (page images at HathiTrust)
Find more by Robert Webster Kehr at your library, or elsewhere.