Found in articles
William H. (1994). Radiation Protection. CRC Press. p. 15. ISBN 978-0-87371-996-4. Reported thus far are 237 cases of acute radiation sickness and 31 deaths
دانشنامهٔ ویکیپدیای انگلیسی، بازبینیشده در ۵ آذر ۱۳۹۲. Uranium | Radiation Protection Program | US EPA NLM Hazardous Substances Databank - Uranium, Radioactive
"Medical Radiation Exposure Of The U.S. Population Greatly Increased Since The Early 1980s" (Press release). National Council on Radiation Protection & Measurements
تابش زمینه
November 2012. Ionizing radiation exposure of the population of the United States. Bethesda, Md.: National Council on Radiation Protection and Measurements.
Online Features and Print (به انگلیسی). Elsevier Health Sciences. «Radiation Protection in Medical Radiography - 6th Edition». www.elsevier.com. دریافتشده