Polychlorinated biphenyl, mercury, and cadmium concentrations in Minnesota snapping turtles.

@article{Helwig1983PolychlorinatedBM,
  title={Polychlorinated biphenyl, mercury, and cadmium concentrations in Minnesota snapping turtles.},
  author={Dennis Helwig and M E Hora},
  journal={Bulletin of environmental contamination and toxicology},
  year={1983},
  volume={30 2},
  pages={186-90}
}