1. Colorimetric Determination of Chlorine Residuals up to 10 ppm. With Ortho-tolidine. Part I: Production of Ortho-tolidine-Chlorine Colors;Chamberlin;Jour. A.W.W.A.,1943
2. Readjustment of Permanent Ortho-tolidine Standards for Chlorine;Muer;Jour. A.W.W.A.,1925
3. Fortune Unpublished Master's Thesis Purdue Univ. Lafayette, Ind.