Lead, in modern industry :  of lead. 

 - New York :  Lead Alloys and Lead compoynds,  1952. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Metales
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>622.344