U.S. Department of Health, Education, and Welfare, Public Health Service, Bureau of State Services, Division of Sanitary Engineering Services, Robert A. Taft Sanitary Engineering Center1954Series of research reports on individual sewage disposal systems
3rd , Public Health Service publication
no. 397
Federal Security Agency, Public Health Service, Environmental Health Center1949-1950Series of research reports on individual sewage disposal systems
1st-2nd