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The Ecologic Method in the Study of Environmental Health. II. Methodologic Issues and Feasibility
Stephen D. Walter U.S. Dept. of Health, Education, and Welfare, Public Health Service, National Institutes of Health, National Institute of Environmental Health Sciences 1991 Environmental health perspectives Vol.94 No.1
Journal of Environmental Science and Health, Part C
Taylor & Francis Inc. ISSN : 1059-0501;1532-4095
Environmental health- Australian Institute of Environmental Health
Institute of Environmental Health ISSN : 1444-5212;1832-3367