AEC research reports. WT-1172. Operation teapot, Nevada test site, Feb.-May 1955, civil effects test group [report to test director]: project 37.3, Evaluation of acute inhalation hazard from radioactive fall-out materials by analysis of results from field operations and controlled inhalation studies in laboratory [with list of references; by G. V. Taplin, O. M. Meredith, jr., H. Kade].