Author
United States. Bureau of Labor Statistics
8
Small, Sylvia S.
2
Chen, Da, 1892-
1
Clark, Lindley Daniel, 1862-
1
Dewhurst, J. Frederic 1895-1967
1
Frincke, Martin C.
1
Magnusson, Leifur, 1882-
1
Nathan, Robert R.
1
United States Bureau of Labor Statistics
1
Wharton School. Industrial Research Department
1
Winslow, Charles Henry, 1866-
1