"10-APR-00" . "ST28GSPS" . "Unavailable" . "TrapTh228SE" . . "accepted" . . "ST28GSPS" . "1" . "1" . "Activity standard error of thorium-228 {228Th} per unit dry weight of suspended particulate material by sediment trapping and gamma spectroscopy"@en . "ST28GSPS" .