Harris, Robert T. <br/><br/>
Language and informal logic 
Robert T. Harris and James L. Jarrett. 
 - New York  Longmans, Green  1956. 
 - 274 p. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language and languages<br/>Communication