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200 10$aStability of nitrate-ion concentrations in simulated deposition samples used for quality-assurance activities by the U.S. Geological Survey /$fby Timothy C. Willoughby, Randolph B. See, and LeRoy J. Schroder
210  1$aDenver, Colorado :$cU.S. Geological Survey,$d1989.
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225 1 $aWater-resources investigations report ;$v89-4042
320   $aIncludes bibliographical references (page 15).
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702   $aSee$b Randolph B.
702   $aSchroder$b L. J.
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200 00$a15th Annual IEEE Symposium on Logic in Computer Science
210 31$a[Place of publication not identified]$cIEEE Computer Society Press$d2000
215   $a1 online resource (500 pages)
300   $aBibliographic Level Mode of Issuance: Monograph
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