Sources and transport of phosphorus and nitrogen during low-flow conditions in the Tualatin River, Oregon, 1991-93 /
Kelly, Valerie J.
Lynch, Dennis D.
Rounds, Stewart.
Washington County (Or.).Unified Sewerage Agency.
Geological Survey (U.S.)
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver, CO ; For sale by the U.S. Geological Survey, Branch of Information Services,
1999.
Shipping list no.: 2000-0175-P.
Includes bibliographical references (p. 74).
Water quality
Phosphorus
Nitrogen