Reading of environmental radioactivity level by prefecture [13; 00 March 24, 2011]
4-3-2-4 Radiation survey of environment
Reading of environmental radioactivity level by prefecture [19; 00 March 24, 2011]
Reading of environmental radioactivity level by prefecture [13; 00 March 25, 2011]
Reading of environmental radioactivity level by prefecture [19; 00 March 25, 2011]
Radioactivity density of seawater (Appendix)