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200 10$aNitrate in ground water and spring water near four dairy farms in North Florida, 1990-93 /$fby William J. Andrews
210  1$aTallahassee, Florida :$cU.S. Geological Survey,$d1994.
215   $a1 online resource (vi, 63 pages) $cillustrations, maps
225 1 $aWater-resources investigations report ;$v94-4162
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