1. Kodaira, K. (1964) Radioactive contamination of rice in Japan, with reference to 90Sr and 137Cs content in rice until 1962, J. Radiat, Res. 5: 1-4.
2. National Institute of Radiological Sciences (1963) Strontium-90 and cesium-137 in rice and wheat. Radioactivity Survey Data in Japan (NIRS) No. 1: 7-8.
3. National Intitute of Radiological Sciences (1964) Strontium-90 and cesium-137 in rice. ibid. No. 3: 14-15.
5. Miyake, Y., Saruhashi, K., Katsuragi, Y. and Kanazawa, T. (1961) Deposition of 137Cs and 90Sr in Tokyo. Papers in Meteorology and Geophysics. 12: 180-181.