The Government Publishing Office (GPO) has launched a new federated search tool (link below).
Use it to search AGRICOLA Books, Access to Archival Databases (AAD) System - NARA, AUL Index to Military Periodicals, Catalog of U.S. Government Publication (CGP), Education Resources Information Center (ERIC), Environmental Protection Agency (EPA) Catalog Search, Library of Congress (LOC), PubMed, TRIS Online, and USA.gov.