1a. Construction employment in the United States, 1992-2009 (All types of employment) Source: U.S. Bureau of Labor Statistics, 1992-2009 Current Population.
Occupational Health: The Anna Baetjer Course Bruce Lippy, Ph.D., CIH, CSP Director of Safety Research, CPWR 5/5/12.
1a. Construction employment in the United States, 1992-2009 (All types of employment)
