Polta, R. C., & Stulc, D. A. (1979). Automatic sludge blanket control in an operating gravity thickener. Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory ; for sale by the National Technical Information Service.
Citazione stile Chigago Style (17a edizione)Polta, R. C., e D. A. Stulc. Automatic Sludge Blanket Control in an Operating Gravity Thickener. Cincinnati, Ohio : Springfield, Va.: Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory ; for sale by the National Technical Information Service, 1979.
Citatione MLA (8a ed.)Polta, R. C., e D. A. Stulc. Automatic Sludge Blanket Control in an Operating Gravity Thickener. Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory ; for sale by the National Technical Information Service, 1979.