Government Documents: Federal
Most government documents at Grand Valley are classified in SuDocs, a system designed by the federal government. What's great about this system of classification is that documents from a particular agency are grouped together. Sometimes, though, how an agency's documents are classified may change. For example, current publications from the Department of Education would be in ED, but if you were looking for something published in the 1970s, it would be located under HE since the Department of Education used to be the Department of Health, Education, and Welfare (now the Health and Human Services Department).
For a basic introduction on SuDocs try this website from Michigan State.
If you have any trouble finding a government document, ask for help at the service desk or from any library employee.