Kagen, Sergius <br/><br/>
On studying singing 
/ by Sergius Kagen 
 - New York   : Dover Publications  , cop. 1950 
 - (129 p.)   ; 21 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cant<br/>Ensenyament
<br/><br/><label>Universal Decimal Class. No.: </label>CONS