1. 1. Head Office on Emergency Countermeasure of nuclear fuel facility accident at Tokaimura. (1999) Conference documents of the 1st meeting on Oct. 1 1999. (in Japanese).
2. 2. Head Office of the Investigation for the Criticality Accident. Science and Technology Agency. (1999) Document No. 11-3-1. Dosimetry study around JCO accidental site. (in Japanese).
3. External Doses of Residents near Semipalatinsk Nuclear Test Site
4. 4. Head Office of Countermeasure in Science and Technology Agency of Japan. (1999) Status of Accident in JCO Tokai and Effects to Environment. No. 66, 1-1, Document of Atomic Energy Safety Committee. (in Japanese).
5. 5. Zenrin Mito office. (1999) Star Map Tokaimura Ibaragi. Zenrin, Kitakyushuu.