Erdos, Paul L. <br/><br/>
Professional mail surveys 
Paul L. Erdos, with the assistance of Arthur J. Morgan. 
 - New York  McGraw-Hill  [1970] 
 - xi, 289 p.  illus., forms. 
<br/><br/>Bibliography: p. 276-277. 
<br/><br/><label>LCCN: </label>75095800 //r82 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mail surveys.<br/>Public opinion polls<br/>Social Surveys
<br/><br/><label>LC Class. No.: </label>HF5415.3  / .E7 
<br/><br/><label>Dewey Class. No.: </label>311/.28