Norlin, Julia M. <br/><br/>
Human behavior and social environment :  social systems theory / 
by Julia M. Norlin[et..al] 
 - 4th ed. 
 - London :  Allyn & Bacon,  c2003. 
 - 449 p. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0205359574 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social service.<br/>social system--Mathematical models.<br/>Social systems.
<br/><br/><label>LC Class. No.: </label>HV40  / .H7813