Macaulay, F.S. <br/><br/>
Algebraic theory of modular systems 

 - Cambridge  CUP  1994 
 - xxxi,112p.  23 cm. 
<br/><br/><label>ISBN: </label>0521455626 
<br/><br/><label>Dewey Class. No.: </label>512.24,  / D, Mac