Searching OneSearch will bring back all types of resources: articles, journals, books, electronic books, videos, and government documents:
After conducting your search, use the filters on the left to narrow to specific resource types, locations, etc.
Use Interlibrary Loan (ILL) to get items from other libraries.
If you still can't find what you are looking for try searching the Catalog of U.S. Government Publications (CGP) or the U.S. Government Bookstore.