Part 1. Induced Radioactivity in Europium, by Kasimir Fajans and David W. Stewart. Part 2. Induced Radioactivity in Strontium and Yttrium, Nuclear Isomers in Strontium, by David W. Stewart. From the Dissertation... Submitted... in the University of Michigan
Brief Presented by His Worship Lt. Col. J. David Stewart, D.S.O., E.D. to the Royal Commission on Broadcasting