If your just trying to locate the business itself, try the phonebook. This, or the phone directory should help. Home Page Small fee for business reports, but a powerful and easy database to search through. Associations Many associations will sell, or list their membership affiliations, publish extensively, and will also lead you to the experts. Encyclopedia of Associations by Gale Research, published annually sits behind every reference librarian's desk.
Gale also publishes an International and local collection of associations.
Through special Mini Homepages, which include company and association profiles, sources online, position papers, and links to press releases. Organizations in SourceBank appear through a membership fee. American Society of Association Executives ASAE hosts the Gateway to Associations Online - a decent start when trying to locate associations of a particular specialty. ASAE also hosts 6 other searchable databases ranging from convention centers to Worldwide executives. An address book of think tanks, advocacy groups, and special-interest organizations.