http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Emission standards reference guide for heavy-duty and nonroad engines
In scope of the U.S. Government Publishing Office Catalog and Indexing Program (C&I) and Federal Depository Library Program (FDLP).
GPO Cataloging Record Distribution Program (CRDP).
[Washington, D.C.] : United States Environmental Protection Agency, Air and Radiation, 1997