1. Effects of copper on Gammarus pseudolimnaeus, Physa integra, and Campeloma decisum in soft water;Arthur;J. Fish. Res. Board Can.,1970
2. Babcock, L. L., and Spiroff, K. 1970. Recovery of copper from Michigan stamp sands. Institute of Mineral Research, Mich. Tech. Univ. U.S. Bur. Mines Project 00180241 (SWD-18). Vol. 1:57.
3. Adaptation of the polychaete Nereis diversicolor to estuarine sediments containing high concentrations of heavy metals;Bryan;Jour. Mar. Biol. Assn. U.K.,1971
4. Burch, J. B. 1972. Freshwater sphaeriacean clams (Mollusca: Pelecypoda) of North America. Water Pollut. Control Res. Ser. EP1.l6:18050 ELD 03/72/No.3.
5. Eisler, R. 1973. Annotated bibliography of biological effects of metals in aquatic environments. U.S. Environ. Prot. Agency, Ecol. Res. Ser. EPA-R3-73007.