The Ozark Society Foundation is a conservation organization with scientific, literary, educational and philanthropic programs in the Ozark-Ouachita Highlands and adjacent areas. The collection consists of administrative files that include the articles of incorporation and trust agreement; financial records; correspondence; subject files such as the Arkansas/Mount Everest Expedition; a photocopy of the manuscript of Wildflowers of the Ozarks by Dorothy Leake; and records pertaining to the Foundation's book sales.

Records of the Ozarks Society, a an environmental activist organization founded in Arkansas in order to preserve the Buffalo River that continues to the present day seeking to conserve the state's natural environment and limit the impact of factory agriculture and other sources of pollution and environmental degradation. Early and later accessions.

The Ozark Society autonomous chapter, the Highlands Chapter, was organized at a meeting in Fayetteville, Arkansas in 1970 with the goals of encouraging conservation, education, and recreation. This collection includes by-laws; correspondence; meeting minutes; membership lists; financial records; subject files pertaining to such subjects as Buffalo National River and nature conservation; newsletters and photographs.

The OMNI Center for Peace, Justice, and Ecology is an organization based in Fayetteville, Washington County, Arkansas that is dedicated to world peace, non-violence, human rights, social justice, and a variety of environmental issues.The collection contains organizational materials, correspondence, event promotional materials, newspaper clippings, and photographs.

The Arkansas Audubon Society, a state chapter of the National Audubon Society, is a non-profit organization. The Society aims to foster a greater knowledge of Arkansas' natural history and to promote the conservation of its natural resources. This collection includes financial records, meeting minutes, membership lists, and correspondence.

Papers concerning legal action opposing the Corps of Engineers' proposed Gillham Lake Project on the Cossatot River and De Queen Lake Project on Rolling Fork River, Arkansas. Paper inventory available in special collections.