Index.@enschema:descriptionContains 7,200 alphabetically arranged entries that provide information about various aspects of American history, covering politics, the arts, science and technology, the military, economics, and other topics; and includes a cross-referenced index.@enschema:exampleOfWork<http://worldcat.org/entity/work/id/1909496056>schema:genreHistory@enschema:genreDictionaries"@