Many government agencies publish periodicals.
Government periodical titles are frequently one of the best sources of information about current events. Outside newspapers, for example, the military periodicals were the first sources to have reports about the Gulf War. There have been two publications that index the contents of federal government periodicals. The Index to U.S. Government Periodicals has a single index of authors, titles, and subjects. Its article citations include periodical title abbreviations along with the customary volume, number, pages, and date.