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200 10$aAlgal conditions and the potential for future algal problems in the Willamette River, Oregon /$fby David A. Rickert [and four others]
210  1$a[Reston, Virginia] :$cUnited States Department of the Interior, Geological Survey,$d1977.
215   $a1 online resource (vi, G39 pages) $cillustrations, maps
225 1 $aGeological Survey circular ;$v715-G
225 0 $aRiver-quality assessment of the Willamette River Basin, Oregon
320   $aIncludes bibliographical references (pages G35-G36).
606   $aEutrophication$zOregon$zWillamette River
606   $aFreshwater algae$zOregon$zWillamette River
606   $aWater quality$zOregon$zWillamette River
606   $aEutrophication$2fast
606   $aFreshwater algae$2fast
606   $aWater quality$2fast
607   $aWillamette River (Or.)
607   $aOregon$zWillamette River$2fast
615  0$aEutrophication
615  0$aFreshwater algae
615  0$aWater quality
615  7$aEutrophication.
615  7$aFreshwater algae.
615  7$aWater quality.
700   $aRickert$b David A.$f1940-$01384814
712 02$aGeological Survey (U.S.),
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200 10$aPhotographic guide of selected external defect indicators and associated internal defects in yellow-poplar /$fEverette D. Rast, John A. Beaton, David L. Sonderman
210  1$aRadnor, Pennsylvania :$cUnited States Department of Agriculture, Forest Service, Northeastern Forest Experiment Station,$d1991.
215   $a1 online resource (13 pages) $cillustrations
225 1 $aResearch paper NE ;$v646
300   $aTitle from title screen (viewed September 6, 2016).
300   $a"May 1991."
320   $aIncludes bibliographical references (page 29).
606   $aLiriodendron tulipifera$zOhio$vPictorial works
606   $aLiriodendron tulipifera$xDefects$zOhio$vHandbooks, manuals, etc
606   $aWood$xDefects$zOhio$vHandbooks, manuals, etc
606   $aTrees$xWounds and injuries$zOhio$vHandbooks, manuals, etc
606   $aLiriodendron tulipifera$2fast
607   $aOhio$2fast
608   $aPictorial works.$2fast
608   $aHandbooks and manuals.$2lcgft
615  0$aLiriodendron tulipifera
615  0$aLiriodendron tulipifera$xDefects
615  0$aWood$xDefects
615  0$aTrees$xWounds and injuries
615  7$aLiriodendron tulipifera.
700   $aRast$b Everette D.$01392319
702   $aBeaton$b John A.
702   $aSonderman$b David L.
712 02$aNortheastern Forest Experiment Station (Radnor, Pa.),
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