1. Agency for Toxic Substances and Disease Registry (ATSDR). (1989). Toxicological profile for selenium. Report prepared by Clement Associates under Contract No. 205–88–0608. December.
2. Agency for Toxic Substances and Disease Registry (ATSDR). (1992). Draft: Toxicological profile for mercury. Report prepared by Clement International Corporation under Contract No. 205–88–0608 for the U.S. Department of Health and Human Services. October.
3. Agency for Toxic Substances and Disease Registry (ATSDR). (1993a). Toxicological profile for arsenic. Report prepared by Clement International Corporation under Contract No. 205–88–0608 for the U.S. Department of Health and Human Services. April.
4. Agency for Toxic Substances and Disease Registry (ATSDR). (1993b). Toxicological profile for lead. Report prepared by Clement International Corporation under Contract No. 205–88–0608 for the U.S. Department of Health and Human Services. April.
5. Agency for Toxic Substances and Disease Registry (ATSDR). (1993c). Toxicological profile for cadmium. Report prepared by Life System, Inc, TP-92/06.