Ratio sourcebooks contain financial and operating ratios, and composite balance sheet and income statements for specific industries, usually arranged by SIC or NAICS numbers. They are used when comparing a company's ratios to the industry standard. These are all available in print at 2 North Reference.
Dun and Bradstreet Industry Norms and Key Business Ratios Ref HF 5681 .R25 I525
RMA Annual Statement Studies Ref HF 5681 .R25 R6
Almanac of Business and Industrial Financial Ratios Ref HF 5681 .R25 T68