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200 10$aL@S '17 $eproceedings of the fourth (2017) ACM Conference on Learning @ Scale : April 20-21, 2017, Cambridge, MA, USA /$fsponsored by ACM
210  1$aNew York :$cACM,$d2017.
215   $a1 online resource (340 pages)
300   $aIncludes index.
311   $a1-4503-4450-X 
517 1 $aLearning @ Scale '17 :$eproceedings of the fourth (2017) Association for Computing Machinery Conference on Learning @ Scale : April 20-21, 2017, Cambridge, Massachusetts, United States of America
517 1 $aLearning @ Scale 2017
517 1 $aProceedings of the fourth (2017) ACM Conference on Learning @ Scale
517 1 $aProceedings of the fourth (2017) Association for Computing Machinery Conference on Learning @ Scale
606   $aMOOCs (Web-based instruction)$vCongresses
606   $aDistance education$xComputer-assisted instruction$vCongresses
606   $aInternet in education$vCongresses
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615  0$aInternet in education
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200 10$aHydrogeologic and water-quality characteristics of the Ironton-Galesville aquifer, southeast Minnesota /$fby J.F. Ruhl, R.J. Wolf and D.G. Adolphson
210  1$a[St. Paul, Minn.] :$cUnited States Department of the Interior, Geological Survey,$d1984.
210  2$aDenver, Colorado :$cOpen-File Services Section Western Distribution Branch.
215   $a1 online resource (13 maps)
225 1 $aWater-resources investigations report ;$v82-4080
300   $aRelief shown by contours and spot heights.
300   $aTitle from title screen (viewed April 4, 2016).
300   $a"Hydrogeology modified from Mossler, 1983."
300   $aPrepared in cooperation with the U.S. Environmental Protection Agency.
320   $aIncludes text, bibliography, tables, and 1 cross-section.
327   $aplate 1. Geology and ground water -- plate 2. Ground-water quality.
606   $aAquifers$zMinnesota$vMaps
606   $aGroundwater$zMinnesota$vMaps
606   $aWater quality$zMinnesota$vMaps
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615  7$aAquifers.
615  7$aGroundwater.
615  7$aWater quality.
702   $aRuhl$b J. F.
702   $aAdolphson$b D. G$g(Donald G.),$f1928-1990,
702   $aWolf$b R. J$g(Ronald J.),
712 02$aUnited States.$bEnvironmental Protection Agency.
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