USGS scientists collecting water samples from a lake.
By South Atlantic Water Science Center (SAWSC)
2007 (approx.)
![USGS scientists collecting water samples from a lake.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/sawsc-banner-theme-about_0.jpg?itok=Z6lPJQ-M)
Detailed Description
USGS scientists collecting water samples on the Upper Mississippi River.
Sources/Usage
Public Domain.