. . . . . . . . . . "Absorbance of electromagnetic radiation (558nm wavelength) {light absorbance} by the suspended particulate material >GF/F by filtration and spectrophotometry on filtrate"@en . "Spectrophotometric scan on GF/F filtered material"@en . "accepted"@en . . "SPMA558A" . . . . . "SDN:P01::SPMA558A" . . . . . . . . . . .