Productivity and its impact on employment and labour relations in th e coal mining industry /    
Coal Mines Committee. 
 - Geneva :   International Labour Office,   1995. 
 - 41 p.:    ill.;    30 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal miners.--Labor productivity------<br/>Coal mines and mining --Labor productivity------