Duckworth, William. <br/><br/>
A creative approach to music fundamentals / 
William Duckworth. 
 - Belmont :  Wadsworth Pub. Co.,  1981. 
 - xiv, 301 p. :  ill. ;  24 cm. 
<br/><br/> Open access. 
<br/><br/><label>ISBN: </label>0534008917 
<br/><br/><label>LCCN: </label>8022286  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Music--Instruction and study.<br/>Music--Theory.