Roberts, Don D. <br/><br/>
The existential graphs of Charles S. Peirce / 
by Don D. Roberts 
 - The Hague :  Mouton,  c1973 
 - 168 p. :  ill. ;  24 cm. 
 - Approaches to semiotics ;  v. 27 .
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label> DG 45 
<br/><br/><label>Subjects--Personal Names: </label><br/>Peirce, Charles S. 1839-1914 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Logic diagrams
<br/><br/><label>Dewey Class. No.: </label>162