Stevens, J. C., and S. W. Szczytko. 1990. The use and variability of the biotic index to monitor changes in an effluent stream following wastewater treatment plant upgrades. Pp. 33-46 in Proceedings of the 1990 Midwest Pollution Biology Meeting, W. S. Davis, ed. EPA-905-9-90/ 005. Chicago, Ill.: U.S. Environmental Protection Agency.

Suter, G. W., II. 1993. A critique of ecosystem health concepts and indexes. Environmental Toxicology and Chemistry 12:1533-1539.

United States Environmental Protection Agency, Office of Water Regulations and Standards. 1990. Biological Criteria, National Program Guidance for Surface Waters. EPA-440/5-90-004. Washington, D.C.: U.S. Environmental Protection Agency.

United States Environmental Protection Agency, Office of Research and Development, Environmental Research Laboratory. 1991. Environmental Monitoring and Assessment Program. EMAP—Surface Waters Monitoring and Research Strategy—Fiscal Year 1991. EPA/600/3-91/022. Corvallis, Ore.: U.S. Environmental Protection Agency.

United States Environmental Protection Agency, Office of Water. 1994. National Water Quality Inventory: 1992 Report to Congress. EPA 841-R-94-001. Washington, D.C.: U.S. Environmental Protection Agency.

Yoder, C. O. 1989. The development and use of biological criteria for Ohio rivers and streams. In Water Quality Standards for the 21st Century. G. H. Flock, ed. Washington, D.C.: Office of Water, U.S. Environmental Protection Agency.

Yoder, C. O. 1991a. Answering some concerns about biological criteria based on experiences in Ohio. In Water Quality Standards for the 21st century, G. H. Flock, ed. Washington, D.C.: U.S. Office of Water, Environmental Protection Agency .

Yoder, C. O. 1991b. The integrated biosurvey as a tool for evaluation of aquatic life use attainment and impairment in Ohio surface waters. In Biological Criteria: Research and Regulation. EPA-440/5-91-005:110. Washington, D.C.: Office of Water, U.S. Environmental Protection Agency.

Yoder, C. O., and E. T. Rankin. 1995a. Biological criteria program development and implementation in Ohio. Pp. 109-144 in Biological Assessment and Criteria: Tools for Water Resource Planning and Decision Making, W. Davis and T. Simon, eds. Boca Raton, Fla.: Lewis Publishers.

Yoder, C. O., and E. T. Rankin. 1995b. Biological response signatures and the area of degradation value: New tools for interpreting multimetric data. Pp. 263-286 in Biological Assessment and Criteria: Tools for Water Resource Planning and Decision Making, W. Davis and T. Simon, eds. Boca Raton, Fla.: Lewis Publishers.