![Seasonal variations of
<sup>228</sup>
Ra/
<sup>226</sup>
Ra and
<sup>228</sup>
Th/
<sup>228</sup>
Ra ratios in surface water from the eastern East China Sea]()
Seasonal variations of
<sup>228</sup>
Ra/
<sup>226</sup>
Ra and
<sup>228</sup>
Th/
<sup>228</sup>
Ra ratios in surface water from the eastern East China SeaYoshida, K.; Inoue, M.; Kiyomoto, Y.; Minakawa, M.; Kofuji, H.; Nagao, S.; Hamajima, Y.; Yamamoto, M. · EPJ Web of Conferences · 2012