964 resultados para Illinois. Division of Soil and Water Conservation
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Mode of access: Internet.
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"The Illinois Environmental Protection Agency monitors surface waters (i.e. lakes and streams) through a variety of programs. The most extensive is the Ambient Water Quality Monitoring Network (AWQMN) which consists of 203 stream stations statewide sampled on a 6 week cycle since October 1977." -- p. 1.
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"August 1984."
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"IEPA/WPC/88-009."
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"IEPA/WPC/93-192."--Cover.
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Mode of access: Internet.
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15 August 1988.
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15 August 1988.
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"Section of Wildlife Research".
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"April 1997."
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Bibliography: p. 73-76.
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Bibliography: p. 33.
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"IEPA/WPC/89-275"--Cover.
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Bibliography: p. 19-20.
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"Center for Wildlife Ecology."