PARKINS, A.E. Whitaker, J.R. <br/><br/>
On natural resources and their conservation 
/[by] A.E.Parkins, J.R.Whitaker 
 - London  John Wiley & Sons  1939 
 - 647 p. 
<br/><br/><label>ISBN: </label>82782 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sustainable development
<br/><br/><label>Dewey Class. No.: </label>333.72  / PAR