You can also do a Google search but limit to site:usgs.gov
This Library receives many publications from the USGS, however you cannot find all of them listed individually in OneSearch by author or paper title, especially older publications. If you can't find a title by searching the OneSearch Library Catalog, you can try this method: determine the series and report number and then use the table to identify a call number.
Many reports are available online and searchable via the USGS Publications Warehouse. Or try a Google search but remember to limit to site:usgs.gov