Taylor, Edgar. <br/><br/>
Twenty-Sixth Session, 1916-1917. 

 - Londres-XXK :   The Institution of Mining and Metallurgy,   1917. 
 - p. 1-11 
 - Irregular 
 - No. 148(Jan.1917) 
 - Bulletin of the Institution of Mining and Metallurgy,  ;   No. 148 .
 - Reino Unido.   The Institution of Mining and Metallurgy,. .
<br/><br/><br/>Inglés.