Weller Susan C. <br/><br/>
Systematic data collection/  
Susan C .Weller.  
 - California:     SAGE,  1987. 
 - 96 p. : 
<br/><br/><label>ISBN: </label>803930739 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social Sciences 
<br/><br/><label>LC Class. No.: </label>H62 .W415 1987