Wages And Hours Of Work In The Coal-mining Industry. 
International Labor Office. 
 - xix, 279 ;  24 cm. 
 - STUDIES AND REPORTS series D (Wigs Hours of Work )  ;   No. 18. .
<br/><br/>Includes bibliographical references.<br/> 
<br/><br/><br/>Text in English 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Wages <br/>Coal-mining<br/>Labor economics
<br/><br/><label>Subjects--Geographic Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>331.21  / IN . W