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182   $cc$2rdamedia
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200 10$aExternal quality-assurance results for the National Atmospheric Deposition Program/National Trends Network, 1995-96 /$fJohn D. Gordon
210  1$aDenver, Colo. :$cU.S. Dept. of the Interior, U.S. Geological Survey :$cU.S. Geological Survey, Information Services [distributor],$d1999.
215   $a1 online resource
225 1 $aWater-resources investigations report ;$v99-4072
320   $aIncludes bibliographical references.
606   $aAcid deposition$zUnited States$xTesting
606   $aAtmospheric deposition$zUnited States
606   $aQuality assurance
615  0$aAcid deposition$xTesting.
615  0$aAtmospheric deposition
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700   $aGordon$b J. D$01383710
712 02$aGeological Survey (U.S.)
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996   $aExternal quality-assurance results for the National Atmospheric Deposition Program$93428903
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