Author
Geological Survey (U.S.)
4,146
German Culture Class Collection (University of Pennsylvania)
2,318
Culture Class Collection (University of Pennsylvania)
2,317
Braunschweig (Duchy)
1,632
Karl I, Duke of Brunswick-Lüneburg, 1713-1780
903
SpringerLink (Online service)
696
Geological Survey (U.S.) Water Resources Division
508
Cold Regions Research and Engineering Laboratory (U.S.)
425
Carl Wilhelm Ferdinand, Duke of Brunswick and Lüneburg, 1735-1806
273
National Water-Quality Assessment Program (U.S.)
227
Unesco
216
ebrary, Inc
199
International Association of Hydrological Sciences
194
United States Army. Corps of Engineers
188
United States Environmental Protection Agency
161
Anton Ulrich, Herzog von Braunschweig-Wolfenbüttel, 1633-1714
160
ProQuest (Firm)
157
Rudolf August, Duke of Brunswick-Lüneburg, 1627-1704
124
United States Soil Conservation Service
113
United States Bureau of Reclamation
104
Water Survey of Canada
102
World Meteorological Organization
91
Maria Theresa, Empress of Austria, 1717-1780
90
August, Duke of Braunschweig-Lüneburg, 1579-1666
88
Austria Sovereign (1740-1780 : Maria Theresa)
88
Institut geografii (Akademii︠a︡ nauk SSSR)
87
United States National Park Service
87
Lower Austria (Austria)
86
United States Department of Energy
84
August Wilhelm Braunschweig-Lüneburg, Herzog, 1662-1731
83
United States Bureau of Land Management
82
International Association of Scientific Hydrology
74
United States National Oceanic and Atmospheric Administration
74
California Department of Water Resources
72
Canada Inland Waters Directorate
68
Institut geografii (Akademii͡a nauk SSSR)
68
Singh, V. P (Vijay P.)
64
American Geophysical Union
63
Goudie, Andrew
63
Li, Daoyuan, -527
63
De Gruyter
61
International Hydrological Programme
59
United States National Weather Service
56
International Association of Hydrogeologists
53
International Glaciological Society
52
Southwest Florida Water Management District (Fla.)
52
Upper Austria (Austria)
50
U.S. Fish and Wildlife Service
49
United Nations Environment Programme
49
Geological Survey (U.S.) Surface Water Branch
48
more ...