Effects of pollutants at the ecosystem level/ nork Sheehan, Patrick J, International Council on Scientific Unions. Scientific Committee on Problems of the Environment

Environmental impact assessment : principles and procedures / nork Munn, R. E., International Council of Scientific Unions. Scientific Committee on Problems of the Environment

Environmental risk assessment / nork Whyte, Anne V. T., Burton, Ian, International Council of Scientific Unions. Scientific Committee on Problems of the Environment

Lead, mercury, cadmium, and arsenic in the environment / nork Hutchinson, T. C. (Thomas C.), 1939-, Meema, K. M., International Council of Scientific Unions. Scientific Committee on Problems of the Environment

Environmental sciences in developing countries nork Scope/Unep Symposium on Environmental Sciences in Developing Countries (1974 : Nairobi), Dworkin, Daniel M., International Council of Scientific Unions. Scientific Committee on Problems of the Environment, United Nations Environment Programme