Headquarters USA : a directory of contact information for headquarters and other central offices of major business & organizations nationwide / Edited by C. Perkins. - 23rd edition - Detroit, Mich. : Omnigraphics, Inc., 2001-. - v. ; 29 cm. Latest issue consulted: 29th ed. (2007). V. 1 (2001, 1598 p.) V. 2 (2001, 3066 p.) Each ed. published in 2 vols. ISSN: 1531-2909 Subjects--Topical Terms: Business enterprises Subjects--Geographic Terms: United States--Directories. Subjects--Index Terms: commerce business phone book