Belson, William A. <br/><br/>
Validity in survey research :  with special reference to the techniques of intensive interviewing and progressive modification for testing and constructing difficult or sensitive measures for use in survey research : a report / 
by William A. Belson ; based upon research under the direction and control of William Belson ; with participation by J.G. Cleland ... [et al.]. 
 - Aldershot, Hants, England ;  Brookfield, Vt., USA :  Gower,  c1986. 
 - xviii, 565 p. :  ill., microfiche ;  23 cm. +  1 microfiche. 
<br/><br/> One microfiche in pocket.  Includes index. 
<br/><br/><label>ISBN: </label>0566005107 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social surveys.<br/>Market surveys.<br/>Interviewing.<br/>Social sciences--Methodology.
<br/><br/><label>Dewey Class. No.: </label>307.2  / BEL N86V