GovInfo provides free public access to official publications from all three branches of the Federal Government.
Search U.S. Government Publishing Office’s Catalog of U.S. Government Publications for catalog records. Many records link to the full text.
All FDLP Resource Guides are open educational resources for anyone to share, copy, and reuse.
The U.S. Government produces a variety of informational and interactive maps and geospatial resources, of which this guide provides some examples.
Topographic map of Mount St. Helens from 1983 (Source: U.S. Geological Survey)