Boston Public Library
Kirstein Business Library

Concourse Level, Johnson Building, Central Library, 617-859-2142

Industry Ratios on the Internet

BizStats.com
http://www.bizstats.com/

2007 Economic Census Industry Ratios (US Census Bureau)
http://www.census.gov/econ/census/ratios.htm

IRS: Business Tax Statistics
http://www.irs.gov/taxstats/bustaxstats/index.html