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Eberhardt, L. Lee; And Others – Environmental Science and Technology, 1976
This paper is concerned with problems in assessing the behavior of trace substances introduced into natural systems, sampling models of five classes that might be used in the study of contaminants are reviewed. Adaptation of an industrial experimentation method and techniques used in economic geology to ecological sampling is recommended.…
Descriptors: Ecological Factors, Ecology, Environment, Environmental Research

Environmental Science and Technology, 1973
The Regional Air Pollution Study (RAPS) to be conducted in St. Louis, is the largest air monitoring program of the Environmental Protection Agency. A key segment will be the collection of a data base on which this system of mathematical models can be tested and upon which submodels can be validated. (BL)
Descriptors: Air Pollution, Data Collection, Environmental Influences, Environmental Research