Knapp, Brian. <br/><br/>
Challenge of the human environment/ 
Brian Knapp, Simon Ross and Duncan McCrae 
 - England:  Addison Wesley Longman Limited,  1989. 
 - 272p.:  ill.  24 cm. 
<br/><br/>include index. 
<br/><br/><label>ISBN: </label>0582016371 9780582016378 
<br/><br/><label>LC Class. No.: </label>GF75  / .K72 1989