Concentration of cadmium, copper, lead, and zinc in six species of freshwater clams.
D000818:Animals; D049872:Bivalvia / Q000378:metabolism*; D002104:Cadmium / Q000032:analysis*; D003300:Copper / Q000032:analysis*; D007854:Lead / Q000032:analysis*; D015032:Zinc / Q000032:analysis*
D002104:Cadmium; D007854:Lead; D003300:Copper; D015032:Zinc