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Location: HD 2721.I63. (Volumes 1-94 in print; later volumes online.) This is a multi-volume (and growing) set. At the end of each company's history there is a bibliography. The indexes (one to companies and persons and one to industries) in the latest volume cover entries from all the volumes.
Older Company Histories in Books
Studies in Enterprise by Lorna M. Daniells.
Location: Z 7164.C81H26 1957 There are subject and author indexes.
United States Corporation Histories: A Bibliography, 1965-1990 by Wahib Nasrallah.
Location: HD 2785.T87 N37 1991 There are indexes by industry, author, and executive officer.