Ward's Business Directory (Hardcover, 46th ed.)

"Ward's now lists more than 114,500 companies, 90% of which are private. Volumes 1, 2 and 3 provide current company information in a single A-Z arrangement. Volume 4 is a geographic company listing, offering at-a-glance evaluations of industry activity through rankings and analysis. Consult Volume 5 for national rankings by sales within SIC codes at the 4-digit level; Volume 8 presents these rankings by NAICS codes. Volumes 6 and 7 rank companies in each state by sales within 4-digit SIC codes and provide brief evaluations of industry activity of leading companies for each state.