Simmons, I. G. (Ian Gordon), 1937-  Simmons, I. G. (Ian Gordon), 1937- <br/><br/>
Resource systems / 
Ian and Carol Simmons. 
 - London :  Macmillan,  1974. 
 - Aspects of geography .
<br/><br/>Bibliography: p. 48. 
<br/><br/><label>ISBN: </label> L.0.70 
<br/><br/><label>LCCN: </label>75328549 //r85 
<br/><br/><label>Nat. Bib. No.: </label>GB74-29938 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology.<br/>Natural resources.
<br/><br/><label>LC Class. No.: </label>GF41  / .S545 
<br/><br/><label>Dewey Class. No.: </label>333.7