Bridges not walls : a book about interpersonal communication 
Stewart, John. 
 - second edition. 
 -  Addison-Wesley Publishing Company.  1977 
 - xiii, 298 pages. 
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<br/><br/><label>ISBN: </label>0-201-07227-0 
<br/><br/><label>Dewey Class. No.: </label>158.2 St4b 1977