Headquarters USA : a directory of contact information for headquarters and other central offices of major business & organizations in the United States and in Canada / Business enterprises United States Directories. Commerce. Telephone. 380.1 19 HEA Each ed. published in 2 vols. Latest issue consulted: 29th ed. (2007). Detroit, Mich. : Omnigraphics, Inc., 2008. 2008. 2001 Text Collection volumes ; eng Business phone book USA Headquarters USA Headquarters USA United States Directories. United States Telephone directories. United States. United States. fast (OCoLC)fst01204155 United States