Nelson, Prosser Robert. <br/><br/>
Managing environmental systems / 
Robert Prosser Nelson. 
 - Nelson house :  Thomas nelson and sons ltd,  1995. 
 - 255p. :  ill. ;  28cm. 
<br/><br/> includes index. 
<br/><br/><label>ISBN: </label>017448223X 98765432 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology.
<br/><br/><label>LC Class. No.: </label>GF75  / .P76 1995