Volume 3 lists firms by zip code within state. Volume 4 ranks firms by sales according to SIC code number. Covers companies in the U.S. and Canada. First two sections list parent companies with their foreign subsidiaries. Entries give parent name, address, telephone number, direct subsidiaries, associate firms, country of incorporation, etc.
Fourth section is index of subsidiaries and associates.
Also gives percentage of ownership. Wright Investors' Service. It also gives country-wide and worldwide company rankings. Covers over 1,000 financial and service companies in 24 countries. Wright Investors' Service. 5 vols.