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/3-2nd-3-BK-1.jpg?itok=CpE7P2Uh)
Detailed Description
A USGS scientist operates an X-ray diffraction machine at the National Center in Reston, VA.
Sources/Usage
Public Domain.
A USGS scientist operates an X-ray diffraction machine at the National Center in Reston, VA.
Public Domain.