Productivity of labor in merchant blast furnaces 
Subtitle: December, 1928.
Series: Bulletin of the United States Bureau of labor statistics,; no. 474.  Miscellaneous series
Publisher: U.S. Govt. print. off.
Published: 1929
Place of publication: Washington
Language: eng
Number of pages: 145
Subjects: Blast furnaces.; Labor productivity.
Notes: At head of title:  U.S. Department of labor.  James J. Davis, secretary.  Bureau of labor statistics.  Ethelbert Stewart, commissioner.
Issued also as House doc. no. 423, 70th Cong., 2d sess.