TY - RPRT TI - Speciation Methods Used to Assess Potential Health Effects of Toxic Metals in Environmental Materials AU - Ruth E. Wolf AU - Suzette A. Morman AU - Geoffrey S. Plumlee PY - 2008 DO - 10.3133/ofr20081350 UR - https://pubs.usgs.gov/publication/ofr20081350 ID - ofr20081350 ER -