953 resultados para Data protection
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PB90-215120
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Mode of access: Internet.
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The MESA Puget Sound Project is sponsored by the National Oceanic and Atmospheric Administration and the Environmental Protection Agency.
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Mode of access: Internet.
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Mode of access: Internet.
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Mode of access: Internet.
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"Prepared in part under contract 68-01-3255, task 3."
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"IEPA/BOW/00-001"--Cover.
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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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"IEPA/BOW/02-021."--Cover.
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Cover title.
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At head of cover title: Illinois Environmental Protection Agency, Bureau of Land.
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"IEPA/WPC/84-004."-- Cover.
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On cover: Water quality management.
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"Statistical summary of Illinois public water supplies (State operated facilities excluded)."