United States. Federal Housing Administration
M. S. Bedinger
Indiana State Board of Health.
John H. Timothy Winneberger
Ontario. Ministry of the Environment.
William B. Herms
H. L. Belton
Universal Portland cement company.
Karen Mancl
Reuben Ernest Selfridge
World Health Organization (WHO)
Ellis M. Santee
Washington (State). Dept. of Social and Health Services. Water Supply and Waste Section.
United States. Public Health Service.
E. W. Lehmann