Creator
- Lunden, Herman, 1859-19291
- Mershon, William B., 1856-19431
- Michigan Botanical Club.1
- Michigan Citizens Against Toxic Substances.1
- Michigan Environmental Council.1
- Michigan Natural Areas Council.1
- Michigan Nature Association.1
- Michigan United Conservation Clubs.1
- Mill Creek Research Council, inc.1
- Osborn, Chase S. (Chase Salmon), 1860-1
- Romney, George W., 1907-1
- Sax, Joseph L.1
- Sharkey, Reginald, 1913-20051
- Sheppard, Glen, 1936-1
- Sierra Club. Michigan Chapter.1
- Symon, Charles.1
- Titus, Harold, 1888-19671
- University of Michigan. Dept. of History.1
- University of Michigan. School for Environment and Sustainability.1
- Van Coevering, Jack.1