1. Knowlton , Kenneth F. Investigation of the Continuous Recording of Fluoride Concentration in Water J. NEWWA 68 16 1954 Babcock , Russell H. Dobson , John G. Ibid
2. Fluoridation by Automatic Control;Knowlton;Wtr. & Sew. Wks.,1955
3. Effect of Synthetic Detergents on Chemical Coagulation of Water;Howells;Wtr. & Sew. Wks.,1956