The Mackinaw River Basin : an inventory of the region's resources / [Susan L. Post].

"A product of the Critical Trends Assessment Program (CTAP) and the Ecosystems Program of the Illinois Dept. of Natural Resources (DNR)"--P. [2] of cover.

The Spoon River basin : an inventory of the region's resources 1998 /

"A product of the Critical Trends Assessment Program (CTAP) and the Ecosystems Program of the Illinois Department of Natural Resources (IDNR)--P. [2] of cover.

The upper Des Plaines River basin : an inventory of the region's resources /

"A project of the Critical Trends Assessment Program (CTAP and the Ecosystems Program of the Illinois Department of Natural Resources (IDNR)"--P. [2] of cover.

Wetland Monitoring and Assessment Program for the State of Illinois /

"IEPA/BOW/07-020"--Cover.

Mark Trail tells how prescribed fire can be helpful to southern ecosystems : a book to color.

"Reprinted"--P. [4] of cover.

Suction dredging in the national forests : dredging responsibly to protect river ecosystems.

"September 1997"--P. [3] of cover.

Wetland Reserve Program : restoring America's wetlands.

"February 2000"--P. [3] of cover.

Wetland Evaluation Technique (WET).

"October 1987."

Proceedings : Symposium on Sustainable Management of Hemlock Ecosystems in Eastern North America, June 22-24, 1999, Durham, New Hampshire /

Includes bibliographical references.

Dynamic behavior of vinyl chloride in aquatic ecosystems /

Prepared for Environmental Research Laboratory, Office of Research and Development, U. S. Environmental Protection Agency, Athens Georgia.

Organochlorine pesticides and PCBs in aquatic ecosystems of the Central Columbia Plateau.

Mode of access: Internet.

Effects of fire on Madrean Province ecosystems : a symposium proceedings /

"December 1996."

The ecological impact of synthetic organic compounds on esturine ecosystems /

Subject Profile Index: p.169-353.