Choyke, W.. "I. The average energy loss per ion path in helium and neon ; II. A low-pressure helium diffusion chamber and the beta spectrum of Cd¹¹³ /." Doctoral dissertation, Ohio State University, 1952. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486396102521392Chicago Manual of Style (17th edition)