1. Barker, R. J.: 1958, ?Notes on Some Ecological Effects of DDT Sprayed on Elms?, Journal of Wildlife Management 22, 269?274.
2. Beyer, W. N. and Gish, C. D.: 1980, ?Persistence in Earthworms and Potential Hazards to Birds of Soil Applied DDT, Dieldrin and Heptachlor?, Journal of Applied Ecology 17, 295?307.
3. Carey, A. E., Gowen, J. A., Tai, H., Mitchell, W. G., and Wiersma, G. B.: 1978, ?Pesticide Residue Levels in Soils and Crops, 1971-National Soils Monitoring Program (III)?, Pesticides Monitoring Journal 12 (3), 117?136.
4. Carey, A. E., Douglas, P., Tai, H., Mitchell, W. G., and Wiersma, G. B.: 1979, ?Pesticide Residue Concentrations in Soils of Five United States Cities, 1971-Urban Soils Monitoring Program?, Pesticides Monitoring Journal 13(1), 17?22.
5. Clark, D. R. Jr., and Prouty, R. M.: 1976, ?Organochlorine Residues in Three Bat Species from Four Localities in Maryland and West Virginia, 1973?, Pesticides Monitoring Journal 10(2), 44?53.