1. Long-Term Operating Characteristics of Anion-Exchange Resins;Frisch;Ind. Eng. Chem.,1957
2. Organic Matter in Demineralization;Bogers;Water (Holland),1954
3. Frisch , N. W. Changes in Operating Characteristics of Anion-Exchange Resins After Field Use Proc. 16th Annual Water Conf., Eng. Soc. Western Pennsylvania 97 1955
4. Our Present Knowledge of Humic Acids and of Their Detrimental Influence on Chemistry of Feedwater;Fuchs;Mitt. Ver. Grosskesselbesitzer (Ger.),1956
5. The Quantitative Determination of Water-Soluble Humic Acids and Their Removal From Boiler Feedwaters;Fuchs;Mitt. Ver. Grosskesselbesitzer (Ger.),1957