USGS Scientist at Work
![Image: USGS Scientist at Work](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/1-3nd-1-mc-b-1.jpg?itok=LVa7BgYb)
Detailed Description
Brent Knights and Jon Vallazza conduct a river productivity study aboard the E.D. Cope, Upper Mississippi River System.
Sources/Usage
Public Domain.
Brent Knights and Jon Vallazza conduct a river productivity study aboard the E.D. Cope, Upper Mississippi River System.
Public Domain.