Contents: S. Wiktelius and C.A. Edwards: Organochlorine Insecticide Residues in African Fauna:1971-1995.-W.-X. Wang and N.S. Fisher: Modeling Metal Bioavailability for Marine Mussels.-J.J. Evans: Rubber Tire Leachates in the Aquatic Environment.-W.C. Koskinen and S.A. Clay: Factors Affecting Atrazine Fate in North Central U.S. Soils.