Horacek, Leo <br/><br/>
Programmed ear training volume 1 :  Intervals, melody and rhythm 

 - 2nd ed. 
 - United States of America :  Harcourt Brace Jovanovich,  1989. 
<br/><br/><label>ISBN: </label>0155720260 
<br/><br/><label>Dewey Class. No.: </label>781.424