from Dietz et al. (1996), where the Pb analyses have been critically evaluated and only data for samples with N >= 8 were included.
Dietz, R., F. Riget and P. Johansen 1996. Lead, cadmium, mercury and selenium in Greenland marine animals
Cartographer / Designer
Graphical production: Philippe Rekacewicz and Emmanuelle Bournay (GRID-Arendal)