http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
GPO Cataloging Record Distribution Program (CRDP).
Issues have chronological designation only, Nov./Dec. 1998-
Web site describes publication as bimonthly, but mastheads for individual issues for 2010- state publication pattern of four issues a year (viewed Apr. 22, 2013).
Vols. for <1987-> published jointly the Naval Historical Center and Naval Air Systems Command; Jan./Feb. 2009- by: Naval History and Heritage Command.
United States. Navy Department. Bureau of Aeronautics.