by Alice Hamilton ... December, 1921.
|Main Author:||Hamilton, Alice, 1869-1970.|
Washington, Govt. Print. Off., 1922.
Issued also as House doc. 273, 67th Cong., 2d sess.
At head of title: U.S. Department of Labor. James J. Davis, secretary. Bureau of Labor Statistics. Ethelbert Stewart, Commissioner.
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|Full view291 (1922)||Harvard University|