Breakpoint analysis and relations of nutrient and turbidity stressor variables to macroinvertebrate integrity in streams in the Crawford-Mammoth Cave Uplands ecoregion, Kentucky, for the development of nutrient criteria [electronic resource] / by Angela S. Crain and Brian J. Caskey ; prepared in cooperation with the U.S. Environmental Protection Agency and the Kentucky Energy and Environment Cabinet.
Imprint
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2010.