Valkovic, Vlado <br/><br/>
Trace elements in coal / 
Vlado Valkovi c 
 - Boca Raton, Fla. :  CRC Press,  1983 
 - v. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal--Analysis<br/>Trace elements--Analysis