Blum, Milton L. <br/><br/>
Data gathering  experimental methods plus 
Milton L Blum 
 - New York:  Harper and Row,  1986. 
 -  x,324p. 
<br/><br/> PB 
<br/><br/>Includes bibliography and index 
<br/><br/><br/>eng 
<br/><br/><label>ISBN: </label>0060407778 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social surveys
<br/><br/><label>Dewey Class. No.: </label>300.72  / BLD