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https://experts.arizona.edu/en/publications/characterization-of-the-perylenequinone-pigments-in-japanese-ando/ Characterization of the perylenequinone pigments in Japanese Andosols and Cambisol - University of... of the in japanese characterization pigments https://dare.uva.nl/id/81fa35a9-8df1-4a3d-b2b9-ee277b7bfb7b UvA DARE | Radiocarbon dating of soil organic matter fractions in Andosols in Northern Ecuador