Callegaro, Mario, <br/><br/>
Web survey methodology / 
Mario Callegaro, Katja Lozar Manfreda, Vasja Vehovar. 
 - xiii, 318 pages ;  24 cm. 
<br/><br/><label>ISBN: </label>9780857028600 9780857028617  RM 143.32 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Surveys--Methodology.<br/>Internet surveys.