"Concentration standard deviation of C36 alkenoates+C37+C38 alkenones per unit volume of the water body [particulate >GF/F phase] by filtration and gas chromatography-mass spectrometry"@en . . "SDN:P01::SDCAGAP1" . "The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement."@en . .