"4" . . . "2019-06-04 17:33:52.0" . . "4" . . . "SDN:P01::ST28GSPS" . "TrapTh228SE" . . . "The standard error of the mean (defined as the standard deviation divided by the square root of the sample size) of multiple determinations of the specified phenomenon."@en . . . "false" . "2019-06-04 17:33:52.0" . "accepted"@en . . . . . "Activity standard error of thorium-228 {228Th CAS 14274-82-9} per unit dry weight of suspended particulate material by sediment trapping and gamma spectroscopy"@en . "SDN:P01::ST28GSPS" . . "SDN:P01::ST28GSPS" . .