Sommer, Robert <br/><br/>
A practical guide to behavioral research  tools and techniques 
Robert Sommer and Barbara B. Sommer 
 - 2nd 
 - New York  Oxford University Press  1986 
 -  296p 
<br/><br/> Includes index 
<br/><br/><br/>eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences-Research-Data processing
<br/><br/><label>Dewey Class. No.: </label>150.72  / SOP