Search Results - "Water quality."

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Water quality 1,793 Eau 735 Qualité 708 Groundwater 479 Environmental aspects 329 Water 267 Stream measurements 224 more ... Pollution 223 Water quality management 205 Water-supply 202 Eau souterraine 181 Quality 168 Hydrology 157 Measurement 136 Water resources development 134 Hydrogeology 130 Aspect de l'environnement 114 Cours d'eau 95 Aquifers 88 Streamflow 87 Groundwater flow 86 Gestion 80 Nutrient pollution of water 69 Water quality biological assessment 58 Mathematical models 57 Hydrologie 54 Analysis 52 Environmental conditions 52 Ecology 50 Jaugeage 50 less ...

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West Virginia University 1,110 Bucknell University 925 Lehigh University 867 Marshall University 689 Montclair State University 660 State Library of Pennsylvania 653 more ... University of Pittsburgh 376 Pennsylvania State University 365 Commonwealth University of Pennsylvania 306 Villanova University 236 Rutgers University 153 Temple University 83 University of Pennsylvania 45 Muhlenberg College 27 New York University 26 Rensselaer Polytechnic Institute 25 West Chester University 21 Lafayette College 19 Drexel University 17 Carnegie Mellon University 16 Franklin and Marshall College 16 Ursinus College 16 Pennsylvania Western University 15 Dickinson College 13 Drew University 12 Indiana University of Pennsylvania 12 Bryn Mawr College 9 Gettysburg College 9 Slippery Rock University 9 Allegheny College 7 see all ... less ...

Book 1,811 Government Document 1,492 Serial 152 Map 109 Conference Proceeding 52 Electronic 22 more ... Journal 8 Manuscript 8 Unknown 7 Audio 4 Thesis 4 Musical Score 3 Kit 1 Photo 1 see all ... less ...

G - Geography, Anthropology, Recreation

Geological Survey (U.S.) 1,320 National Water-Quality Assessment Program (U.S.) 176 Geological Survey (U.S.). Water Resources Division 149 United States. Environmental Protection Agency 53 United States. Bureau of Reclamation 40 United States. National Park Service 30 more ... United States. Bureau of Land Management 23 U.S. Fish and Wildlife Service 20 United States. Bureau of Indian Affairs 20 New Jersey. Department of Environmental Protection 19 United States. Army. Corps of Engineers 17 United States. Department of Energy 17 Washington (State). Department of Ecology 17 Pennsylvania. Department of Environmental Protection 14 Anderson, Chauncey W. 13 Davis, Jerri V. 13 Goldstein, Robert M. 13 Pope, Larry M. 13 Spaulding, Malcolm L. 13 Wisconsin. Department of Natural Resources 12 Embrey, S. S. 11 Langland, Michael J. 11 International Association of Hydrological Sciences 10 Oregon. Department of Environmental Quality 10 Rinella, Frank A. 10 Robertson, Dale M. 10 American Society of Civil Engineers 9 Arizona. Department of Water Resources 9 Butler, David L. (David Louis), 1946- 9 Chesapeake Bay Program (U.S.) 9 see all ... less ...

English 2,084 Spanish 8 French 7 German 4 Dutch 2 Hindi 1 more ... Italian 1 Russian 1 see all ... less ...

Maps 161 Periodicals 136 Government publications 127 Statistics 79 Congresses 57 Cartes géographiques 50 more ... Electronic books 35 Conference papers and proceedings 22 Yearbook 19 Congrès 17 Périodiques 15 Statistiques 13 Thematic maps 13 Internet resource 12 Handbooks, manuals, etc 10 Geological maps 7 History 7 Actes de congrès 6 Handbooks and manuals 6 Atlas 5 Atlases 5 Congress 5 Guides et manuels 5 Guides, manuels, etc 5 Periodical 5 Biographies 4 Biography 4 Technical reports 4 periodicals 4 proceedings (reports) 4 see all ... less ...

1959- 1 1977 1 1980 1 1990 1 From 230 to 570 million years ago 1 PALEOCENO 1 more ... Paleozoic 1 Paléozoïque 1 see all ... less ...

United States 307 Florida 108 Colorado 91 California 80 Washington (State) 68 Wisconsin 67 more ... Oregon 62 Minnesota 58 New Jersey 53 Arizona 52 Kansas 51 Pennsylvania 51 Texas 48 Ohio 44 New York (State) 42 États-Unis 38 Floride 38 North Carolina 38 Missouri 37 Illinois 36 Californie 34 Massachusetts 34 Utah 33 Montana 32 Nebraska 31 Michigan 27 South Dakota 27 Wyoming 27 Connecticut 26 Indiana 26 see all ... less ...

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