Modeling and measuring natural resource substitution 
/ ed. by Ernst R.Berndt, Barry C.Field 
. - London  : The mit press, 1981
. - 314 p.  ; 24 cm. 
<br/><br/>Bibliogr,index 
<br/><br/><label>ISBN: </label>0262060787 
<br/><br/><label>Source: </label> achat 
<br/><br/><label>Universal Decimal Class. No.: </label>339.5.