Spiegel, Eugene <br/><br/>
Incidence algebras 
Eugene Spiegel, Christopher J. O'Donnell 
 - New York :  M. Dekker,  c1997. 
 - ix, 335 p.   ill.   24 cm 
 - Monographs and textbooks in pure and applied mathematics ;  vol. 206 .
<br/><br/> Bibliografie p. 317<br/>Index p. 327 
<br/><br/><br/>eng 
<br/><br/><label>ISBN: </label>0824700368 (hc : acidfree paper) 
<br/><br/><label>LCCN: </label>96051435  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Incidence algebras
<br/><br/><label>LC Class. No.: </label>QA251.3 
<br/><br/><label>Dewey Class. No.: </label>512.4