Brown, Walter Lee,  1853-1904, <br/><br/>
Manual of assaying :  Gold, silver, lead, copper / 
By Walter Lee Brown 
 - 6 
 - 533 páginas 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ensayes--Manuales
<br/><br/><label>LC Class. No.: </label>TN550  / B76 1896