Berelson Bernard <br/><br/>
Content analysis in communication research   

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 - New York  Hafner Publishing Company  1971 
 - 220 p.  23 cm. 
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<br/><br/>  Communication 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Communication
<br/><br/><label>Dewey Class. No.: </label>001.51  / BER