Ambient water quality criteria recommendations [electronic resource] : information supporting the development of state and tribal nutrient criteria for rivers and streams in nutrient ecoregion I - Willamette and central valleys including all or parts of the states of Washington, Oregon, and California, and the authorized tribes within the region.
Imprint
[Washington, D.C.] : United States Environmental Protection Agency, Office of Water, Office of Science and Technology, Health and Ecological Criteria Division, [2001]
