Data from Selected U.S. Geological Survey National Stream Water-Quality Monitoring Networks (WQN)
USGS Digital Data Series DDS-37

By Richard B. Alexander, James R. Slack, Amy S. Ludtke, Kathleen K. Fitzgerald, and Terry L. Schertz

Quality-Assurance Information

Changes in Field Methods

Changes in Laboratory Methods

Water-Quality Technical Memoranda

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Last modified: Thu Jan 16 15:21:19 EST 1997