Apel, Willi <br/><br/>
Gregorian chant 

 - London  Burns & Oates  1958 
 - xiv,529p.  24cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chants (Plain, Gregorian, etc.)
<br/><br/><label>LC Class. No.: </label>ML3082.A64