Hours and earnings in anthracite and bituminous coal mining.  Anthracite--1919 and 1920, bituminous--1919. 

 - Washington,  Govt. Print. Off.,  1921. 
 - 114 p. incl. tables.  23 cm. 
 - Bulletin of the United States Bureau of Labor Statistics,  Wages and hours of labor series  no. 279 .
 - United States.  Bureau of Labor Statistics.  Wages and hours of labor series.  Bulletin. .
<br/><br/> 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. 1030, U.S., 66th Cong., 3d sess.  "Appendix.--Definitions of occupations": p. 111-114. 
<br/><br/><label>LCCN: </label>l  21000076  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hours of labor.<br/>Wages--United States.<br/>Coal miners--United States.<br/>Coal mines and mining--United States.
<br/><br/><label>LC Class. No.: </label>HD8051  / .A62 no. 279