Helping and being helped naturalistic studies/   
Shirlynn Spacapan. 
 - New Dheli:     SAGE,  1991. 
 - viii, 259 p. :  
<br/><br/> Includes index.   Includes index.  
<br/><br/><label>ISBN: </label>803943288 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Helping behaviour 
<br/><br/><label>LC Class. No.: </label>BF637 .H4H45 1991