Kraft, Leo. <br/><br/>
Gradus:  an integrated approach to harmony, counterpoint, and analysis/ 

 - New York  W.W. Norton & company  1976 
 - 147  p. 
<br/><br/><label>ISBN: </label>393091805 
<br/><br/><label>Dewey Class. No.: </label>CIR 781 K85 1976