Proceedings at the conference, 15th to 17th April, 1958. 

 - London :  Institute of Fuel,  [1959] 
<br/><br/> Held on April 15-17, 1958. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal -- Congresses.--Coal -- Congresses.