Bomberger, H.. "A study of the corrosion and polarization characteristics of copper, nickel, titanium and some copper and nickel alloys in three percent sodium chloride solutions at 30⁰C /." Doctoral dissertation, Ohio State University, 1952. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486395596775341Chicago Manual of Style (17th edition)