1. Operation and maintenance of municipal and larger institutional sewage and waste treatment plants in Minnesota Author(s): Minnesota. Division of Water Pollution Control, author. Publication: [Minneapolis] : Minnesota Department of Health, Section of Environmental Sanitation, Division of Water Pollution Control, 1947 Subject(s): SewageWaste Disposal, FluidMinnesota
2. Chemical waste disposal Publication: [Bethesda, Md. : Medical Arts and Photography Branch, National Institutes of Health, 19--?] Subject(s): SolventsHazardous WasteWaste Disposal, FluidSafety