Residue Analyses: How They Were Used to Assess the Hazards of Contaminants to Wildlife, J.O. Keith DDT, DDD, and DDE in Birds, L.J. Blus Dieldrin and Other Cyclodiene Pesticides in Wildlife, D.B. Peakall Other Organochlorine Pesticides in Birds, S.N. Wiemeyer PCBs in Aquatic Organisms, A.J. Niimi Toxicological Implications of PCB Residues in Mammals, M.A. Kamrin and R.K. Ringer PCBs and Dioxins in Birds, D.J. Hoffman, C.P. Rice, and T.J. Kubiak Dioxins: An Environmental Risk for Fish? D. Sijm and A. Opperhuizen Polycyclic Aromatic Hydrocarbons in Marine Mammals, Finfish, and Molluscs, J. Hellou Lead in Waterfowl, D.J. Pain Interpretation of Tissue Lead Residues in Birds Other Than Waterfowl, J.C. Franson Lead in Mammals, W.-C. Ma Toxicological Significance of Mercury in Freshwater Fish, J.G. Wiener and D.J. Spry Mercury in Birds and Terrestrial Mammals, D.R. Thompson Metals in Marine Mammals, R.J. Law Cadmium in Small Mammals, J.A. Cooke and M.S. Johnson Cadmium in Birds, R.W. Furness Heavy Metals in Aquatic Invertebrates, P.S. Rainbow Selenium in Aquatic Organisms, A.D. Lemly Selenium in Birds, G.H. Heinz Fluoride in Birds, W.J. Fleming Fluoride in Small Mammals, J.A. Cooke, I.C. Boulton, and M.S. Johnson