Pettofrezzo, Anthony J. <br/><br/>
Elements of number theory 
[by] Anthony J. Pettofrezzo [and] Donald R. Byrkit. 
 - Englewood Cliffs, N.J.  Prentice-Hall  [1970] 
 - xii, 244 p.  24 cm. 
<br/><br/> 920327 
<br/><br/><label>ISBN: </label>0132683008 
<br/><br/><label>LCCN: </label>77081766 //r90 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number theory.
<br/><br/><label>LC Class. No.: </label>QA241  / .P48 
<br/><br/><label>Dewey Class. No.: </label>512/.81