Kiley, Leo. "A. A spectrometer for continuous beta emissions of radioactive species ; B. Disintegration of praesodymium--144 ; C. A study of radioactivity in atmospheric precipitation in Columbus, Ohio /." Doctoral dissertation, Ohio State University, 1952. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486396938432797Chicago Manual of Style (17th edition)