Headquarters USA : a directory of contact information for headquarters and other central offices of major business & organizations in the United States and in Canada (Detroit, Mich. : Omnigraphics, Inc., 2008)
Vol. 1. Alphabetical by organization name -- Vol. 2. Classified by subject.
Each ed. published in 2 vols.
Latest issue consulted: 29th ed. (2007).
Keywords: Business enterprises -- United States -- Directories; Commerce; Telephone; Business enterprises; United States -- Directories; United States -- Telephone directories; United States; United States; Directory; Directories; Telephone directories