http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Energy information abstracts 0147-6521 1986-
Energy research abstracts 0160-3604 1986-
Index to U.S. government periodicals 0098-4604 1986-
Supt. of Docs., U.S. Govt. Print. Office, Washington, D.C. 20402