Author
International Joint Commission
100
Great Lakes Environmental Research Laboratory
53
United States Environmental Protection Agency. Great Lakes National Program Office
37
United States Congress. House. Committee on Merchant Marine and Fisheries
33
United States Army. Corps of Engineers. Detroit District
31
Hennepin, Louis, active 17th century
29
U.S. Lake Survey
25
United States Army. Corps of Engineers
22
Great Lakes Water Quality Board
21
International Association for Great Lakes Research
20
Great Lakes Science Advisory Board
19
Great Lakes Fishery Commission
18
International Joint Commission Great Lakes Regional Office
18
National Ocean Survey
18
Assel, Raymond A
17
Geological Survey (U.S.)
17
United States Environmental Protection Agency
17
United States
16
United States Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Water Resources and Environment
16
United States Congress. House. Committee on Naval Affairs
15
Environmental Research Laboratories (U.S.)
14
International Reference Group on Great Lakes Pollution from Land Use Activities
14
U.S. Fish and Wildlife Service
14
United States Board of Engineers for Rivers and Harbors
14
United States General Accounting Office
14
United States National Oceanic and Atmospheric Administration
13
Great Lakes Commission
12
University of Michigan Great Lakes Research Division
12
Great Lakes-St. Lawrence Tidewater Association
11
Hennepin, Louis, 17th cent
11
United States Congress. Senate. Committee on Foreign Relations
11
Conference on Great Lakes Research
10
Disturnell, John, 1801-1877
10
United States Congress. House. Committee on Rivers and Harbors
10
United States Congress. Senate. Committee on Environment and Public Works
10
Canada
9
Canada Environment Canada
9
Lake Survey Center
9
United States Hydrographic Office
9
United States National Ocean Service
9
Environmental Research Laboratory (Duluth, Minn.)
8
Fuller, Margaret, 1810-1850
8
Great Lakes Fishery Laboratory
8
Hartig, John H., 1952-
8
International Great Lakes Levels Board
8
Joliet, Louis, 1645-1700
8
La Salle, Robert Cavelier, sieur de, 1643-1687
8
Marquette, Jacques, 1637-1675
8
United States Army. Corps of Engineers. North Central Division
8
United States Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Fisheries and Wildlife Conservation and the Environment
8
more ...