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  Indian J Med Microbiol
 

Figure 2: 226Ra (214Bi) activity in soil samples obtained from immediate counting after sealing of containers plotted against the activity obtained after 1 month of secular equilibrium period

Figure 2:  <sup>226</sup>Ra (<sup>214</sup>Bi) activity in soil samples obtained from immediate counting after sealing of containers plotted against the activity obtained after 1 month of secular equilibrium period