1. Phosphates and Lake Fertilization;Sawyer;Sewage and Ind. Wastes,1952
2. A Study of the Effects of Diverting the Effluent from Sewage Treatment Upon the Receiving Stream;Mackenthun;Wisconsin Academy of Science, Arts & Letters,1960
3. Phosphates in Sewage and Sludge Treatment (1) Quantities of Phosphate;Rudolfs;J. Sewage Works,1947
4. Studies on the Occurrence of Condensed Phosphate in Surface Waters;Engelbrecht;Sewage and Ind. Wastes,1959
5. Stability of Condensed Phosphates in Very Dilute Solutions;Karl-Kroupa;Ind. Eng. Chem.,1957