Langer, Judith,  1941- , <br/><br/>
The mirrored window :  focus groups from a moderator´s point of view / 
Judith Langer. 
 - xvi, 256 páginas :  ilustraciones 
<br/><br/><label>ISBN: </label>0967143942 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mercadeo--Investigaciones.
<br/><br/><label>Dewey Class. No.: </label>658.8  / L276m 2001