1. The History of Manganese in Water Supplies and Methods for Its Removal;Zapffe;Jour. A.W.W.A.,1933
2. A Simplified Method of Iron and Manganese Removal;Erickson;Jour. A.W.W.A.,1937
3. The Removal of Manganese;Davis;W.W. Eng.,1933
4. Manganese Removal by Breakpoint Chlorination;Edwards;Wtr. & Sew. Wks.,1946
5. A New Method of Determining Residual Chlorine;Marks;Jour. A.W.W.A.,1942