Robertson, Robert H. S.  1911-1999 <br/><br/>
Mineral use guide :  or Robertson's spiders' webs / 
by R. H. S. Robertson. 
 - Second impression. 
 - 44 l. :  (Chiefly diagrams)  20 x 21 cm 
<br/><br/><label>LCCN: </label>61040169 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources
<br/><br/><label>LC Class. No.: </label>TN260  / .R63 1961