100 METERS 1 i a r . oe -*5 +} fe & ae # at 4 3 3 3 ey P ye ® - a s te . ‘ “ “& x + ponte get hat My etree Saat vee ee saa + Fig. B.54,1.n. The average 5°Co activities (pCi/gm) in soil samples collected to a depth of 15 em,

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