Chemical, isotopic, spectroscopy an geochemical aspects of natural and synthetic humic substances von IKAN, R, IOSELIS, P, DORSEY, T, PETERS, K. E, BOON, J. J, DE LEEUW, J. W, ISHIWATARI, R, MORINAGA, S, YAMAMOTO, S, MACIHARA, T, MULLER-VONMOOS, M, RUB, A, RUBINSZTAIN, Y, AIZENSHTAT, Z, MILOSKAVSKY, I, YARIS, S, PUGMIRE, R, ANDERSON, L. L, WOOLFENDEN, W. R, KAPLAN, I. R

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