Productivity in coal mines.  Third item on the adgenda. 

 - Geneva  n.p.  1951 
 - vi, 177 p.  24 cm. 
<br/><br/> At head of title: Report 3. International Labour Organisation. Coal Mines Committee. 4th session, Geneva, 1951 
<br/><br/><label>LCCN: </label>l  51000030  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining.<br/>Coal miners.<br/>Labor productivity.
<br/><br/><label>LC Class. No.: </label>TN803  / .I73