Simpson R David Ed. <br/><br/>
Productivity in natural resource industries 
Simpson R David Ed. 
 - Washington  RFF            1999 
 - viii,220p  cm. 
<br/><br/><label>ISBN: </label>0915707993  Pd 35.00 
<br/><br/><label>Source: </label> 66862, 26/04/2001, IBD  General Book 
<br/><br/><label>Dewey Class. No.: </label>X:271-89P.73.N9, N9