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Names
- Bentley Historical Library3
- Ecology Center of Ann Arbor.2
- Ann Arbor Tomorrow Council.1
- Bentley Historical Library (collector)1
- Bike-a-thon (Ann Arbor, Mich.)1
- Citizens Association for Area Planning.1
- Cowles, Henry Chandler, 1869-1939.1
- Cowles, Henry Chandler.1
- Cribbs, William Johnston.1
- East Michigan Environmental Action Council.1
- Environmental Fund (U.S.)1
- Federation for American Immigration Reform.1
- Friends of the Jordan River Watershed.1
- Fuller, George Damon.1
- Huron River Watershed Council.1
- Little Traverse Conservancy.1
- Michigan Audubon Society.1
- Michigan Environmental Council.1
- Michigan Garden Clubs.1
- Michigan Land Use Institute.1