Murphy, Frank <br/><br/>
Square One  : a basic maths course for adults 
Frank Murphy 
 - Cambridge:  National Extension College Correspondence Texts,  1973. 
 - 102p.  Volume 3, Lesson 11-15 
<br/><br/><br/>eng 
<br/><br/><label>ISBN: </label>0902404237 
<br/><br/><label>Dewey Class. No.: </label>510  / MUS