Emma Hornby <br/><br/>
Gregorian and Old Roman Eighth-mode Tracts: A Case Study in the Transmission of Western Chant  A Case Study in the Transmission of Western Chant 

 -  Taylor and Francis  2002 
<br/><br/><label>ISBN: </label>9781315192086 
<br/><br/><label>Source: </label>EBOOK