Spiegel, Eugene. <br/><br/>
Incidence algebras 
/ by Eugene Spiegel and Christopher J. O'Donnell 
 - New York:   Marcel Dekker Inc.,   1997. 
 - ix, 335p. 
 - Pure and applied mathematics .
<br/><br/><label>ISBN: </label>0824700368 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebras<br/>Math<br/>Mobius function<br/>Radicals
<br/><br/><label>Dewey Class. No.: </label>512.24  / SPI/I