(Table 4, page 800) U, Th and Pa analyses for the top layers of a ferromangan...

Uranium, Thorium and Palladium measurements were done using an alpha-spectrometry technique described in : Ku, T.L., Broecker, W.S., 1969. Radiochemical studies on manganese...针对铀（Uranium）、钍（Thorium）及钯（Palladium）的测定采用了α能谱法（alpha-spectrometry），该方法详见Ku、Broecker二人1969年发表的《锰的放射化学研究……》。