Radiation Units and Conversion Factors (US Department of Health and Human Services tool for Radiation Emergency Medical Management).

Radiation Terms and Definitions (Washington State Department of Public Health)

Radiation Science (Health Physics Society)

Radiation Risk Assessment Tool (National Cancer Institute)

Exposure to Radiation: Preventative Measures (World Health Organization)

National Council on Radiation Protection (NCRP)

International Commission on Radiological Protection (ICRP)

Center for Domestic Preparedness (Department of Homeland Security)

BEIR VII Phase 2 Report (on biological effects of exposure to low levels of ionizing radiation – released by the U.S. National Academies of Science)

The History of Nuclear Proliferation – (Council on Foreign Relations)

Bulletin of Atomic Scientists – Current Events – Nonproliferation News

National Diet of Japan Fukushima Accident Independent Investigation Commission Report