1941.
Bulletin of the United States Bureau of Labor Statistics ; no. 679
Book
1933.
Bulletin of the United States Bureau of Labor Statistics ; no. 591 Wages and hours of labor series
Book
1933.
Bulletin of the United States Bureau of Labor Statistics ; no. 588 Wages and hours of labor series
Book
1929.
Bulletin of the United States Bureau of Labor Statistics ; no. 504 Wages and hours of labor series
Book
1932.
Bulletin of the United States Bureau of Labor Statistics ; no. 557 Wages and hours of labor series
Book
1933.
Bulletin of the United States Bureau of Labor Statistics. Wages and hours of labor series ; no. 586
Book