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en kodlista med möjliga huvudgrupper (dvs. första klassificeringsnivån i world reference base for soil resources).
a code list of possible reference soil groups (i.e. first level of classification of the world reference base for soil resources).
connell d. w. och markwell r. d. (1990), ”bioaccumulation in the soil to earthworm system”, chemosphere 20, s. 91–100.
connell dw and markwell rd (1990). bioaccumulation in the soil to earthworm system. chemosphere 20: 91-100.