Ultan, Lloyd,  1929-1998. <br/><br/>
Music theory :  problems and practices in the Middle Ages and Renaissance / 
by Lloyd Ultan. 
 - Minneapolis :  University of Minnesota Press,  c1977. 
 - xiv, 267 p. :  music ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 240-243. 
<br/><br/><label>ISBN: </label>0816608024 
<br/><br/><label>LCCN: </label>77075597 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Music theory--History--500-1400.<br/>Music theory--History--15th century.<br/>Music theory--History--16th century.
<br/><br/><label>LC Class. No.: </label>ML 174  / .U47