Butcher, Harold John. <br/><br/>
Sampling in educational research / 
by H.J. Butcher. 
 - Manchester :  Manchester U.P.,  1966. 
 - Statistical guides in educational research ;  no. 3 .
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sampling (Statistics).<br/>Education -- Research.--Education -- Research.
<br/><br/><label>LC Class. No.: </label>LB 1028 BUT 1966