4) Y. HIYAMA and M. SHIMIZU; On the concentration factors of radioactive Cs, Sr, Cd, Zn and Ce in marine organisms, Rec. of Oceanographic Works in Japan, 7, 43 (1964).
5) Y. HIYAMA and J. K. MATSUBARA; On the concentration factors of radioactive I, Co, Fe and Ru in marine organisms, Rec. of Oceanographic Works in Japan, 7, 79 (1964).