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The following HTML text is provided to enhance online readability. Many aspects of typography translate only awkwardly to HTML. Please use the page image as the authoritative form to ensure accuracy. Triska, F. J., and K. Cromack. 1982. The role of wood debris in forests and streams. Pp. 171-190 in R. H. Waring (ed.) Forests: fresh perspectives from ecosystem analysis. Proceedings of the 40th Biology Colloquium, 1979, Oregon State University, Corvallis, USA. Turner, B. L., W. C. Clark, R. W. Kates, J. F. Richards, J. T. Matthews, and B. Mayer. 1990. The Earth as Transformed by Human Actions. Cambridge, Mass.: Cambridge University Press. U.S. Environmental Protection Agency (EPA). 1996. Level III ecoregions of the continental United States (revision of Omernik, 1987) map M-1 (various scales). Corvallis, Ore.: US EPA, National Health and Environmental Health Effects Research Laboratory . U.S. Environmental Protection Agency (EPA). 1997. Environmental Monitoring and Assessment, U.S. Environmental Protection Agency, Program (EMAP) Draft Research Plan. Washington, D.C.: US EPA, Office of Research and Development. U.S. Geological Survey. 1970. The National Arias of the United States of America. Vervier, P. 1992. A perspective on the permeability of the surface freshwater-groundwater ecotone. Journal of the North American Benthological Society 11(1):93-102. Wang, E. X., F. H. Bormann, and G. Benoit. 1995. Evidence of complete scavenging of atmospheric lead in the soils of northern hardwood forest ecosystems. Environ. Sci. Technol. 29:735-739. Wang, S. Y., E. Langendoen, and F. D. Shields, eds. 1997. Management of Landscapes Disturbed by Channel Incision; Stabilization, Rehabilitation, and Restoration. University of Mississippi: Center for Computational Hydroscience and Engineering. Ward, J. V. 1989. The four-dimensional nature of lotic ecosystems. Journal of the North American Benthological Society 8:2-8. Water Information Center. 1973. Water Arias of the United States. Port Washington, New York: Water Information Center, Inc. Webb, J. R., B. J Cosby, F. A. Deviney, J. N. Galloway, M. E. Mitch, D. M. Downey, and K. N. Eshleman. 1997. Release of NO3 to Surface Waters Following Forest Defoliation by the Gypsy Moth. Preprint from Dept. of Environmental Sciences, University of Virginia. Charlottesville, Va.: University of Virginia. Whitney, G. G. 1994. From Coastal Wilderness to Fruited Plain: A History of Environmental Changes in Temperate America from 1500 to the Present. Cambridge, Mass.: Cambridge University Press. Whittier, T. M., R. M. Hughes, and D. P. Larsen. 1988. The correspondence between ecoregions and spatial patterns in stream ecosystems in Oregon. Canadian Journal of Fisheries and Aquatic Science 45:1264-1278. Williams, G. P., and M. G. Wolman. 1984. Downstream effects of dams on alluvial rivers. U.S. Geol. Surv. Prof. Paper 1286. Windom, H. L., J. T. Byrd, J. R. G. Smith, and F. Huan. 1991. Inadequacy of NASQAN data for assessing metal trends in the nation's rivers. Environ. Sci. Technol. 25:1137-1142. Wolman, M. G. 1967. A cycle of sedimentation and erosion in urban river channels. Geografiska Ann. 49A: 385-395.
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