Collection
- Leona Train Rienow Papers, 1856-19881
- Malcolm Willison Papers, 1958-19971
- Nancy Papish Papers, 1953-2001, bulk 1970-19941
- New York Coalition for Alternatives to Pesticides Records, 1908-2002, bulk 1988-19951
- New York Environmental News (NYEN) Collection, 1973-19881
- Norman Studer Papers, 1817-20121
- North Country James Bay Group Records, 1966-19981
- Otsego County Conservation Association Records, 1967-20011
- Preservation League of New York State Records, 1975-20021
- Prudent Residents Opposed to Electric Cable Transmission (PROTECT) Records, 1980-20071
- Rensselaer County Greens Records, 1979-20041
- Robert Doran Papers, 1970-20041
- Robert Rienow Papers, 1875-1984, bulk 1955-19791
- Ronald B. Stafford Papers, 1956-20021
- Saratoga Springs Open Space Project Records, 1970-20031
- Save the Pine Bush, Inc. Records, 1977-20011
- Schoharie Land Trust Records, 1980-20011
- Sierra Club, Atlantic Chapter Records, 1964-19991
- Social Justice Center Records, 1981-20011
- Society for the Preservation of Water Resources Records, 1918-1999, bulk 1981-19991