Geological Survey (U.S.) 278
Geological Survey (U.S.), 117
Michigan. Geological Survey Division 68
United States. National Park Service 53
United States, 32
United States. Forest Service 32
Michigan. Department of Natural Resources 26
Balsley, J. R. 20
United States. Administration on Aging 20
Aichele, Steve S. 19
Cannon, William F. 19
Michigan. Department of Environmental Quality 18
Oakland County (Mich.) 18
Holtschlag, David J. 17
National Water-Quality Assessment Program (U.S.) 15
United States. Bureau of Mines 15
Hill-Rowley, Richard 14
Malone, Matt 14
Manistee Ranger District (Mich.) 14
University of Michigan--Flint. Center for Applied Environmental Research 14
White Cloud Ranger District (Mich.) 14
Luukkonen, C. L. 13
Westjohn, D. B. 13
Blanchett, Jean 12
Meuschke, J. L. 12
Tawas Ranger District (Mich.) 12
United States. Department of the Army 12
United States. Forest Service. Eastern Region. Forest Supervisor's Office (Ironwood, Mich.) 12
Dutton, Carl E. 1904- 11
United States. Environmental Protection Agency 11
United States. Forest Service. Eastern Region 11
United States. National Park Service, 11
Weaver, T. L. 1954- 11
Baldwin Ranger District (Mich.) 10
Huffman, G. C. 10
Mio Ranger District (Mich.) 10
United States. Congress. House. Committee on Natural Resources 10
Huber, N. King 1926- 9
Twenter, F. R. 9
United States. Congress. Senate. Committee on Energy and Natural Resources 9
Cornwall, Henry R. 1913- 8
Cummings, T. Ray 8
Holtschlag, David J., 8
Sims, P. K. 1918-2011 8
Cannon, William F., 7
Cummings, T. Ray, 7
Gair, Jacob Eugene, 1922- 7
High-Sense Geophysics Limited 7
Hoard, C. J. 7
James, H. L. 1912-2000 7
Klasner, J. S. 7
Rheaume, S. J. 7
United States. Army. Corps of Engineers. Detroit District 7
United States. Congress. House. Committee on Resources 7
Wier, K. L. 1914- 7
Area Agency on Aging 1-B (Southfield, Mich.) 6
Fuller, L. M. 6
Grannemann, N. G. 6
Great Lakes Environmental Research Laboratory 6
Harrisville Ranger District (Mich.) 6
Michigan. Department of Agriculture 6
Natural Resource Program Center (U.S.), 6
U.S. Fish and Wildlife Service. Region 3, 6
United States. Congress. Senate. Committee on Indian Affairs (1993- ) 6
United States. Environmental Protection Agency. Great Lakes National Program Office 6
United States. Forest Service, 6
Alminas, Henry V., 1938- 5
Bush, George, 1924-2018 5
Goodrich, Carolyn Stahl 5
Hoffman, J. D. 5
Hopkins, R. T. 5
Hwalek, Melanie 5
James, H. L. 1912-2000, 5
Kirschenheiter, Kathleen 5
Kruger, C. L. 5
Sweat, M. J. 5
Twenter, F. R., 5
USGS Michigan Water Science Center 5
United States. Bureau of Labor Statistics 5
United States. Congress. House. Committee on Appropriations 5
United States. Forest Service. Northern Research Station, 5
United States. President (1989-1993 : Bush) 5
Watersmeet Ranger District (Mich.) 5
Wisconsin Geological and Natural History Survey 5
Allen, William B. 1915-2009 4
Area Agency on Aging of Western Michigan 4
Bayley, Richard W. 1919- 4
Bornhorst, Theodore J., 4
Dumouchelle, D. H. 4
EBSCOhost 4
Educational Resources Information Center (U.S.) 4
Gillespie, J. L. 4
Grannemann, N. G., 4
Great Lakes Restoration Initiative (U.S.) 4
Johnson, R. C. 4
Kenton Ranger District (Mich.) 4
Keweenaw Bay Indian Community, Michigan 4
Klasner, J. S., 4
Long, David T., 1947- 4
Michigan. Department of Transportation 4