Webb, Eugene T. <br/><br/>
Nonreactive measures in the social sciences / 
Eugene T. Webb. 
 - 2nd ed. 
 - Boston :  Houghton Mifflin,  1981. 
 - 394 p. 
<br/><br/><label>ISBN: </label>0395307678 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences--Research.
<br/><br/><label>LC Class. No.: </label>H 62  / .N675