C:
CDC Radiation Emergencies - Information to help people protect themselves during and after radiation emergencies. [U.S. Department of Health and Human Services (HHS), Centers for Disease Control and Prevention (CDC)]

Collection ARRA: Arizona Radiation Regulatory Agency Collection, 1962 - 1972 - National Archives' Archival Research Catalog description for Collection ARRA: Arizona Radiation Regulatory Agency Collection, 1962 - 1972 [U.S. National Archives and Records Administration (NARA)]

L:
Low Dose Radiation Research Program - Researches cellular and molecular responses to doses of X-ray or gamma radiation that are at or near current workplace exposure limits [U.S. Department of Energy (DOE), Pacific Northwest National Laboratory (PNNL)]

R:
Radiation Emergency Medical Management - Evidence-based data for healthcare professionals about radiation emergencies and how to diagnose and manage victims. [U.S. Department of Health and Human Services (HHS), National Inst. of Health (NIH), National Library of Medicine (NLM)]