Fassler, Margot Elsbeth, <br/><br/>
The Divine Office in the Latin Middle Ages : 

 -  Oxford University Press, USA,  2000. 
 - 657 pages 
<br/><br/><label>ISBN: </label>9780195124538 
<br/><br/><label>Subjects--Topical Terms: </label><br/>History.
<br/><br/><label>Dewey Class. No.: </label>264.02015090  / FAS