XAFS Characterization of Copper Contamination in the Unsaturated and Saturated Zones of a Soil Profile D.E. Sayers, D. Hesterberg, W. Zhou, W.P. Robarge and G.M. Plurnmer J. Phys. IV France, 7 C2 (1997) C2-831-C2-832 DOI: 10.1051/jp4:1997252