American Statistical Assotiation / Committee on Governmental Labor Statistics (New York)(1)
Federal Reserve Bank of Philadelphia(1)
Industrial Commission (Wisconsin)(1)
New York (Staat). Department of Labor(1)
Oklahoma. Department of Labor(1)
Russel Sage Foundation / Department of Statistics (New York)(1)
Russell Sage Foundation / Department of Industrial Studies (New York)(1)
The Commonwealth of Massachusetts / Department of Labor and Industries (Boston)(1)